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Class 7 Math: CBSE Sample Question Paper Solutions Term I – 3

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 Page 1


  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
CBSE Board 
Class VII Mathematics 
Term I 
Sample Paper 3 - Solution 
Time: 2 ½ hours                          Total Marks: 80 
 
Section A 
 
1. Correct answer: A 
(128 ÷32)÷ (-4) 
 = 4 ÷ (-4) 
 = -1 
 
2. Correct answer: A 
Total cost = 2.40 × 10 
 = Rs. 24 
 
3. Correct answer: B 
The given observations can be arranged in ascending order as 
4, 6, 9, 10, 11, 12 and 18 
Here, number of observations = 7 (odd) 
Median = Middle observation = 10 
 
4. Correct answer: A 
2x + 3 = 7 
If we will transpose 3 to RHS, then the term with variable will remain on one side 
and the constants will be on other side. 
So, the first step is to transpose 3 to RHS. 
i.e. 2x = 7 – 3 
 
5. Correct answer: C 
?BCA = 180° - 150° = 30°                      (linear pair angles) 
Also, ?B = ?BCA = 30°                           (Angles opp. to equal sides are equal) 
? ?A = 180° - 30° - 30° = 120°            (Using angle sum property of triangle) 
 
6. Correct answer: B 
Increased amount =  
12
Rs. ×54=Rs. 6.48
100
  
 
 
 
Page 2


  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
CBSE Board 
Class VII Mathematics 
Term I 
Sample Paper 3 - Solution 
Time: 2 ½ hours                          Total Marks: 80 
 
Section A 
 
1. Correct answer: A 
(128 ÷32)÷ (-4) 
 = 4 ÷ (-4) 
 = -1 
 
2. Correct answer: A 
Total cost = 2.40 × 10 
 = Rs. 24 
 
3. Correct answer: B 
The given observations can be arranged in ascending order as 
4, 6, 9, 10, 11, 12 and 18 
Here, number of observations = 7 (odd) 
Median = Middle observation = 10 
 
4. Correct answer: A 
2x + 3 = 7 
If we will transpose 3 to RHS, then the term with variable will remain on one side 
and the constants will be on other side. 
So, the first step is to transpose 3 to RHS. 
i.e. 2x = 7 – 3 
 
5. Correct answer: C 
?BCA = 180° - 150° = 30°                      (linear pair angles) 
Also, ?B = ?BCA = 30°                           (Angles opp. to equal sides are equal) 
? ?A = 180° - 30° - 30° = 120°            (Using angle sum property of triangle) 
 
6. Correct answer: B 
Increased amount =  
12
Rs. ×54=Rs. 6.48
100
  
 
 
 
  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
7. Correct answer: C 
?
28
2
33
 
So the multiplicative inverse is
3
8
. 
 
8. Correct answer: D 
The triangle ABC is a right angled triangle,  
By Pythagoras theorem, we have: c
2
 = a
2
 + b
2 
 
9. Correct answer: B 
21b - 32 + 7b - 20b  
= 21b + 7b - 20b – 32  
= 8b – 32 
 
 
10. Correct answer: D 
  
 
11. Correct answer: A 
The two triangles can be proved to be congruent by using SAS congruency criterion. 
The corresponding equal parts in triangles ABC and ADE are 
  
 
12. Correct answer: C 
Let the whole number be x. 
Twice of the whole number = 2x 
9 added to twice of the whole number = 9 + 2x 
From the given information, we have: 
9 + 2x = 31 
2x = 31 - 9 
2x = 22 
x = 11 
Thus, the required whole number is 11. 
 
 
 
 
 
Page 3


  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
CBSE Board 
Class VII Mathematics 
Term I 
Sample Paper 3 - Solution 
Time: 2 ½ hours                          Total Marks: 80 
 
Section A 
 
1. Correct answer: A 
(128 ÷32)÷ (-4) 
 = 4 ÷ (-4) 
 = -1 
 
2. Correct answer: A 
Total cost = 2.40 × 10 
 = Rs. 24 
 
3. Correct answer: B 
The given observations can be arranged in ascending order as 
4, 6, 9, 10, 11, 12 and 18 
Here, number of observations = 7 (odd) 
Median = Middle observation = 10 
 
4. Correct answer: A 
2x + 3 = 7 
If we will transpose 3 to RHS, then the term with variable will remain on one side 
and the constants will be on other side. 
So, the first step is to transpose 3 to RHS. 
i.e. 2x = 7 – 3 
 
5. Correct answer: C 
?BCA = 180° - 150° = 30°                      (linear pair angles) 
Also, ?B = ?BCA = 30°                           (Angles opp. to equal sides are equal) 
? ?A = 180° - 30° - 30° = 120°            (Using angle sum property of triangle) 
 
6. Correct answer: B 
Increased amount =  
12
Rs. ×54=Rs. 6.48
100
  
 
 
 
  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
7. Correct answer: C 
?
28
2
33
 
So the multiplicative inverse is
3
8
. 
 
8. Correct answer: D 
The triangle ABC is a right angled triangle,  
By Pythagoras theorem, we have: c
2
 = a
2
 + b
2 
 
9. Correct answer: B 
21b - 32 + 7b - 20b  
= 21b + 7b - 20b – 32  
= 8b – 32 
 
 
10. Correct answer: D 
  
 
11. Correct answer: A 
The two triangles can be proved to be congruent by using SAS congruency criterion. 
The corresponding equal parts in triangles ABC and ADE are 
  
 
12. Correct answer: C 
Let the whole number be x. 
Twice of the whole number = 2x 
9 added to twice of the whole number = 9 + 2x 
From the given information, we have: 
9 + 2x = 31 
2x = 31 - 9 
2x = 22 
x = 11 
Thus, the required whole number is 11. 
 
 
 
 
 
  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
Section B 
 
13. Given that, m||p and t is the transversal 
We know that, if two parallel lines are cut by a transversal, each pair of alternate 
interior angles are equal. 
So, ? a = ? z (pair of alternate interior angles) 
 Thus, ? z = 57
o
. 
  
14. The numbers in ascending order are: 
11, 12, 12, 12, 19, 23, 33, 34, 34, 45, 46, 49, 50, 55, 56, 65, 67, 78, 81, 87, 98 
As the number of observations (21) are odd, 
Median = middle observation = 11
th
 observation = 46 
Mode is the observation that appears most often. 
Here, 12 appears maximum number of times (thrice). So, 12 is the mode. 
 
15. 725 × (-35) + (-725) × 65 
 = 725 × (-35) - 725 × 65 
 = 725 x (-35 - 65)         [Using distributive property] 
 = 725 × (-100) 
 = -72500 
 
16. Sum of 38 and -87 = 38 + (-87) = 38 - 87 = -49 
 
 Subtracting (-134) from -49, we get 
 -49 - (-134) = -49 + 134 = 85 
 
 
17. Average score = mean score 
? ? ? ? ? ? ? ? ? ?
?
?
?
Sum of all observations
Mean=
Total number of observations
12 23 10 77 15 78 90 54 23 10 1
11
393
11
35.7
 
  
 
18. Pie filling made in 1 minute = 9.2 kg 
Pie filling made in 6 minutes = 6 × 9.2 kg = 55.2 kg 
 
Page 4


  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
CBSE Board 
Class VII Mathematics 
Term I 
Sample Paper 3 - Solution 
Time: 2 ½ hours                          Total Marks: 80 
 
Section A 
 
1. Correct answer: A 
(128 ÷32)÷ (-4) 
 = 4 ÷ (-4) 
 = -1 
 
2. Correct answer: A 
Total cost = 2.40 × 10 
 = Rs. 24 
 
3. Correct answer: B 
The given observations can be arranged in ascending order as 
4, 6, 9, 10, 11, 12 and 18 
Here, number of observations = 7 (odd) 
Median = Middle observation = 10 
 
4. Correct answer: A 
2x + 3 = 7 
If we will transpose 3 to RHS, then the term with variable will remain on one side 
and the constants will be on other side. 
So, the first step is to transpose 3 to RHS. 
i.e. 2x = 7 – 3 
 
5. Correct answer: C 
?BCA = 180° - 150° = 30°                      (linear pair angles) 
Also, ?B = ?BCA = 30°                           (Angles opp. to equal sides are equal) 
? ?A = 180° - 30° - 30° = 120°            (Using angle sum property of triangle) 
 
6. Correct answer: B 
Increased amount =  
12
Rs. ×54=Rs. 6.48
100
  
 
 
 
  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
7. Correct answer: C 
?
28
2
33
 
So the multiplicative inverse is
3
8
. 
 
8. Correct answer: D 
The triangle ABC is a right angled triangle,  
By Pythagoras theorem, we have: c
2
 = a
2
 + b
2 
 
9. Correct answer: B 
21b - 32 + 7b - 20b  
= 21b + 7b - 20b – 32  
= 8b – 32 
 
 
10. Correct answer: D 
  
 
11. Correct answer: A 
The two triangles can be proved to be congruent by using SAS congruency criterion. 
The corresponding equal parts in triangles ABC and ADE are 
  
 
12. Correct answer: C 
Let the whole number be x. 
Twice of the whole number = 2x 
9 added to twice of the whole number = 9 + 2x 
From the given information, we have: 
9 + 2x = 31 
2x = 31 - 9 
2x = 22 
x = 11 
Thus, the required whole number is 11. 
 
 
 
 
 
  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
Section B 
 
13. Given that, m||p and t is the transversal 
We know that, if two parallel lines are cut by a transversal, each pair of alternate 
interior angles are equal. 
So, ? a = ? z (pair of alternate interior angles) 
 Thus, ? z = 57
o
. 
  
14. The numbers in ascending order are: 
11, 12, 12, 12, 19, 23, 33, 34, 34, 45, 46, 49, 50, 55, 56, 65, 67, 78, 81, 87, 98 
As the number of observations (21) are odd, 
Median = middle observation = 11
th
 observation = 46 
Mode is the observation that appears most often. 
Here, 12 appears maximum number of times (thrice). So, 12 is the mode. 
 
15. 725 × (-35) + (-725) × 65 
 = 725 × (-35) - 725 × 65 
 = 725 x (-35 - 65)         [Using distributive property] 
 = 725 × (-100) 
 = -72500 
 
16. Sum of 38 and -87 = 38 + (-87) = 38 - 87 = -49 
 
 Subtracting (-134) from -49, we get 
 -49 - (-134) = -49 + 134 = 85 
 
 
17. Average score = mean score 
? ? ? ? ? ? ? ? ? ?
?
?
?
Sum of all observations
Mean=
Total number of observations
12 23 10 77 15 78 90 54 23 10 1
11
393
11
35.7
 
  
 
18. Pie filling made in 1 minute = 9.2 kg 
Pie filling made in 6 minutes = 6 × 9.2 kg = 55.2 kg 
 
  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
19. Distance travelled with 1 gallon = 
2 32
10 =
33
miles 
Distance travelled with 
1 11
5=
22
gallons. 
11 32
= × miles
23
16
=11× miles
3
176
= miles
3
mile 
Thus, Sam can go 
176
3
miles with 
11
2
gallons. 
 
20.  ASA congruence criterion: 
The Angle Side Angle (ASA) postulate states that if under correspondence, two 
angles and the included side of a triangle is equal to two corresponding angles and 
included side of another triangle, then the two triangles are congruent. 
Consider the triangles ABC and XYZ as shown below. 
 
 
 
Two angles and the included side are congruent. 
? ABC = ? XYZ (equal angle) 
BC = YZ (equal side) 
? ACB = ? XZY (equal angle) 
So, ABC XYZ  
Therefore, by the ASA congruence criterion, the triangles are congruent. 
 
 
 
 
 
 
 
 
Page 5


  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
CBSE Board 
Class VII Mathematics 
Term I 
Sample Paper 3 - Solution 
Time: 2 ½ hours                          Total Marks: 80 
 
Section A 
 
1. Correct answer: A 
(128 ÷32)÷ (-4) 
 = 4 ÷ (-4) 
 = -1 
 
2. Correct answer: A 
Total cost = 2.40 × 10 
 = Rs. 24 
 
3. Correct answer: B 
The given observations can be arranged in ascending order as 
4, 6, 9, 10, 11, 12 and 18 
Here, number of observations = 7 (odd) 
Median = Middle observation = 10 
 
4. Correct answer: A 
2x + 3 = 7 
If we will transpose 3 to RHS, then the term with variable will remain on one side 
and the constants will be on other side. 
So, the first step is to transpose 3 to RHS. 
i.e. 2x = 7 – 3 
 
5. Correct answer: C 
?BCA = 180° - 150° = 30°                      (linear pair angles) 
Also, ?B = ?BCA = 30°                           (Angles opp. to equal sides are equal) 
? ?A = 180° - 30° - 30° = 120°            (Using angle sum property of triangle) 
 
6. Correct answer: B 
Increased amount =  
12
Rs. ×54=Rs. 6.48
100
  
 
 
 
  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
7. Correct answer: C 
?
28
2
33
 
So the multiplicative inverse is
3
8
. 
 
8. Correct answer: D 
The triangle ABC is a right angled triangle,  
By Pythagoras theorem, we have: c
2
 = a
2
 + b
2 
 
9. Correct answer: B 
21b - 32 + 7b - 20b  
= 21b + 7b - 20b – 32  
= 8b – 32 
 
 
10. Correct answer: D 
  
 
11. Correct answer: A 
The two triangles can be proved to be congruent by using SAS congruency criterion. 
The corresponding equal parts in triangles ABC and ADE are 
  
 
12. Correct answer: C 
Let the whole number be x. 
Twice of the whole number = 2x 
9 added to twice of the whole number = 9 + 2x 
From the given information, we have: 
9 + 2x = 31 
2x = 31 - 9 
2x = 22 
x = 11 
Thus, the required whole number is 11. 
 
 
 
 
 
  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
Section B 
 
13. Given that, m||p and t is the transversal 
We know that, if two parallel lines are cut by a transversal, each pair of alternate 
interior angles are equal. 
So, ? a = ? z (pair of alternate interior angles) 
 Thus, ? z = 57
o
. 
  
14. The numbers in ascending order are: 
11, 12, 12, 12, 19, 23, 33, 34, 34, 45, 46, 49, 50, 55, 56, 65, 67, 78, 81, 87, 98 
As the number of observations (21) are odd, 
Median = middle observation = 11
th
 observation = 46 
Mode is the observation that appears most often. 
Here, 12 appears maximum number of times (thrice). So, 12 is the mode. 
 
15. 725 × (-35) + (-725) × 65 
 = 725 × (-35) - 725 × 65 
 = 725 x (-35 - 65)         [Using distributive property] 
 = 725 × (-100) 
 = -72500 
 
16. Sum of 38 and -87 = 38 + (-87) = 38 - 87 = -49 
 
 Subtracting (-134) from -49, we get 
 -49 - (-134) = -49 + 134 = 85 
 
 
17. Average score = mean score 
? ? ? ? ? ? ? ? ? ?
?
?
?
Sum of all observations
Mean=
Total number of observations
12 23 10 77 15 78 90 54 23 10 1
11
393
11
35.7
 
  
 
18. Pie filling made in 1 minute = 9.2 kg 
Pie filling made in 6 minutes = 6 × 9.2 kg = 55.2 kg 
 
  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
19. Distance travelled with 1 gallon = 
2 32
10 =
33
miles 
Distance travelled with 
1 11
5=
22
gallons. 
11 32
= × miles
23
16
=11× miles
3
176
= miles
3
mile 
Thus, Sam can go 
176
3
miles with 
11
2
gallons. 
 
20.  ASA congruence criterion: 
The Angle Side Angle (ASA) postulate states that if under correspondence, two 
angles and the included side of a triangle is equal to two corresponding angles and 
included side of another triangle, then the two triangles are congruent. 
Consider the triangles ABC and XYZ as shown below. 
 
 
 
Two angles and the included side are congruent. 
? ABC = ? XYZ (equal angle) 
BC = YZ (equal side) 
? ACB = ? XZY (equal angle) 
So, ABC XYZ  
Therefore, by the ASA congruence criterion, the triangles are congruent. 
 
 
 
 
 
 
 
 
  
 
CBSE VII | Mathematics 
Sample Paper 3 - Solution  
 
     
21.  Let A and B be the two numbers such that, 
40% of A = 
2
B
3
 
Then,   
?
??
??
? ? ? ?
??
??
??
40 2
100 3
22
53
2 5 10
3 2 3
: 5:3
AB
AB
A
B
AB
 
 
22. Here, AB = PR (= 3.5 cm), 
BC = PQ (= 7.1 cm) 
And AC = QR (= 5 cm) 
 
This shows that the three sides of one triangle are equal to the three sides 
Of the other triangle. So, by SSS congruence rule, the two triangles are 
congruent. From the above three equality relations, it can be easily seen 
that A ? R, B ? P and C ? Q. 
So, we have ?ABC ? ?RPQ 
 
 
 
 
 
 
 
 
 
 
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FAQs on Class 7 Math: CBSE Sample Question Paper Solutions Term I – 3

1. What topics are covered in CBSE Class 7 Maths Term I sample papers?
Ans. CBSE Class 7 Maths Term I sample question papers typically cover integers, fractions, decimals, data handling, simple equations, and basic geometry concepts. These foundational topics test computational skills and problem-solving abilities. Sample papers help students understand the exam pattern, marking scheme, and question distribution. Practising these papers improves confidence before assessments.
2. How do I solve word problems on integers and rational numbers for Class 7 exams?
Ans. Solving word problems on integers and rational numbers requires identifying the operation needed, converting statements into equations, and performing calculations carefully. Read the problem twice, underline key information, and check if answers make sense contextually. Common mistakes include ignoring negative signs and calculation errors. Refer to detailed notes and MCQ tests on EduRev to practise varied problem types systematically.
3. Why do my answers not match the CBSE sample paper solutions even though my method seems right?
Ans. Mismatched answers often occur due to calculation errors, incorrect order of operations, or misinterpretation of questions rather than faulty methods. Review each step carefully, especially with fractions and decimals where small errors multiply. Compare your working with provided solutions line-by-line. Using flashcards and mind maps helps identify conceptual gaps quickly before retrying problems.
4. What are the most important formulas and concepts I need to memorise for Class 7 Maths Term I?
Ans. Key formulas include area of rectangles and triangles, perimeter calculations, simple interest basics, and properties of angles and lines. Understanding concepts matters more than pure memorisation-know why formulas work. Focus on linear equations, data interpretation techniques, and fraction operations. Visual worksheets and PPTs break down abstract concepts into manageable chunks for better retention.
5. How much time should I spend practising CBSE sample papers to improve my Class 7 Maths marks?
Ans. Consistent practice beats quantity; solving 2-3 complete sample papers weekly with detailed solution review yields significant improvement. Time yourself to build speed and accuracy under exam conditions. After completing papers, analyse errors and revisit related concepts immediately. Gradual practice prevents burnout while building examination confidence and conceptual clarity simultaneously.
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