Unit Test (Solutions): We the Travellers—II | Mathematics (Maths Mela) Class 5 - New NCERT PDF Download

Time: 1 hour

M.M. 30

Attempt all questions.

• Question numbers 1 to 5 carry 1 mark each.
• Question numbers 6 to 8 carry 2 marks each.
• Question numbers 9 to 11 carry 3 marks each.
• Question number 12 & 13 carry 5 marks each

Q1. The sum of 3256 and 4897 is: (1 Mark)
(a) 8153
(b) 8143
(c) 8135
(d) 8253
Answer: (a) 8153

3256 + 4897 = 8153

Q2. What is 9000 – 2756? (1 Mark)
(a) 6244
(b) 6344
(c) 6444
(d) 6544
Answer: (b) 6244

• Units: 0 – 6 → borrow 1 from tens → 10 – 6 = 4

• Tens: 9 (after borrowing 1 becomes 8) – 5 = 3

• Hundreds: 0 – 7 → borrow 1 from thousands → 10 – 7 = 3

• Thousands: 8 (after borrowing 1) – 2 = 6

Q3. The missing number in 3256 + ____ = 7000 is: (1 Mark)
(a) 3746
(b) 3754
(c) 3744
(d) 3764
Answer: (c) 3744

3256 + ____ = 7000

Subtract 3256 from 7000:

7000 – 3256 = 3744

Q4. What is the result of 8042 – 4895? (1 Mark)
(a) 3157
(b) 3147
(c) 3257
(d) 3247
Answer: (b) 3147

8042 – 4895 = 3147

Q5. The sum of the largest 4-digit number and the smallest 4-digit number is: (1 Mark)
(a) 19,998
(b) 20,000
(c) 10,999
(d) 20,001
Answer: (c) 10,999

Largest 4-digit number = 9999

Smallest 4-digit number = 1000

Sum = 1000 + 9999

Q6: What is 100 more than: (2 Marks)

(a) 9,175 + 100
(b) 7,132 + 100 
(c) 3,721 + 100

 Ans: 

(a) 9,175 + 100 = 9,275
Start from the hundreds place in 9,175. Adding 100 gives 9,275.

(b) 7,132 + 100 = 7,232
Start from the hundreds place in 7,132. Adding 100 gives 7,232.

(c) 3,721 + 100 = 3,821
Start from the hundreds place in 3,721. Adding 100 gives 3,821.

Q7: What is one more than:  (2 Marks)
(a) 2,738 + 1 
(b) 8,643 + 1

 Ans: 

(a) 2,738 + 1 = 2,739
Start from the ones place in 2,738. Adding 1 gives 2,739.

(b) 8,643 + 1 = 8,644
Start from the ones place in 8,643. Adding 1 gives 8,644.

Q8:  Find the difference between:  (2 Marks)

(a) 153 and 256

​(b) 781 and 651

Ans:

(a) Compute larger − smaller: 256 − 153

• Ones: 6 − 3 = 3

• Tens: 5 − 5 = 0

• Hundreds: 2 − 1 = 1

Answer: 103

(b) Compute larger − smaller: 781 − 651

• Ones: 1 − 1 = 0

• Tens: 8 − 5 = 3

• Hundreds: 7 − 6 = 1

Answer: 130

Q9: Simplify : 7,530 + 1, 817 - 5,173  (3 Marks)

Ans:
Hence, 7,530 + 1,817- 5,173 = 4,174.

Q10: Riya posted 420 photos on her social media account. Out of these, 185 photos received a “like” and 96 photos received a “comment.” How many photos did Riya get a reaction on in total? How many photos did not get any reaction?  (3 Marks)

Ans:
Number of photos with reactions = 185 + 96 = 281
Riya got reactions on 281 photos.
420 – 281 = 139
Riya did not get reactions on 139 photos.

Q11: To qualify for a gaming contest, Sam needs at least 2,000 points. He already scored 725 points in round 1 and 968 points in round 2. How many more points does he need to qualify?  (3 Marks)

Ans:
Total points required to qualify = 2000
Points Sam has = 725 + 968 = 1693
Points still needed = 2000 – 1693 = 307
Sam needs 307 more points to qualify.

Q12: There are 2,468 animals in a barn. There are 812 goats, 679 cows, and the rest are horses. If 127 horses were sold, how many horses are left in the barn?  (5 Marks)

Ans:
Total animals = 2,468
Goats = 812
Cows = 679

First find animals that are not horses:
812 + 679 = 1,491

So number of horses = total − (goats + cows)
= 2,468 − 1,491 = 977 horses initially.

Horses sold = 127

Horses left = 977 − 127 = 850

850 horses remain in the barn.

Q13: I am a 5-digit number. My tens digit is 3. My ones and hundreds digit are thrice the tens digit. My thousands digit is the sum of the ones and tens digit. My ten-thousands digit is the difference between the thousands and ones digit. What number am 'I'?  (5 Marks)

Ans:
Tens digit = 3
∴ Ones digit = 3 × 3 = 9
Hundreds digit = 3 × 3 = 9
Thousands digit = 9 + 3 = 12 → take only the unit digit = 2
Ten-thousands digit = 2 – 9 = -7 → since digits cannot be negative, take the positive difference = 7

∴ The number is
TTh Th H T O
7 2 9 3 9