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Olympiad Test: Integers


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20 Questions MCQ Test Mathematics (Maths) Class 7 | Olympiad Test: Integers

Olympiad Test: Integers for Class 7 2022 is part of Mathematics (Maths) Class 7 preparation. The Olympiad Test: Integers questions and answers have been prepared according to the Class 7 exam syllabus.The Olympiad Test: Integers MCQs are made for Class 7 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test: Integers below.
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Olympiad Test: Integers - Question 1

−4 × (7)  = ?

Detailed Solution for Olympiad Test: Integers - Question 1

Two 'pluses' make a plus, two 'minuses' make a plus. A plus and a minus make a minus.

−4 × (7)  = -28  [∵ (-) x (+) = (-)]

Olympiad Test: Integers - Question 2

−45 ÷ 9 = ?

Detailed Solution for Olympiad Test: Integers - Question 2

−45 ÷ 9 = −5

Olympiad Test: Integers - Question 3

−5 × (−6) =?

Detailed Solution for Olympiad Test: Integers - Question 3

In this question, we have to multiply the integers with the same negative sign.

-5 x -6 = 30  [∵ (-) x (-) = +]

In multiplication, we have to multiply the sign of the integers also and then assign the obtained sign to the answer.
Negative sign multiplied by negative sign gives an overall positive sign.

Olympiad Test: Integers - Question 4

Which of the following is true?

Detailed Solution for Olympiad Test: Integers - Question 4

LHS: (-8) + (-4) = -12
RHS: (-8) – (-4) = -4
⇒ -12 < -4 i.e. LHS<RHS
⇒ (- 8) + (- 4) < (- 8) – (- 4)

Thus, option C is correct.

Olympiad Test: Integers - Question 5

The sum of two integers is -112. If one of them is -109 the other is:

Detailed Solution for Olympiad Test: Integers - Question 5

Let other number be x.
⇒ x + (-109) = -112
⇒ x = -112 + 109 = -3

Olympiad Test: Integers - Question 6

10 × (−3) = ?

Detailed Solution for Olympiad Test: Integers - Question 6

10 × (−3) = -30 [∵ (+) x (-) = -]

Olympiad Test: Integers - Question 7

Difference between 43°C and -17°C is:

Detailed Solution for Olympiad Test: Integers - Question 7

43 - (-17) = 60

Olympiad Test: Integers - Question 8

−67 × (−1) = ?

Detailed Solution for Olympiad Test: Integers - Question 8

-67 x (-1) = 67 [∵ (-) x (-) = +]

Olympiad Test: Integers - Question 9

A place is 45 metre above sea level and another place is 25 meter below sea level. What is the difference of level in metres between the two places?

Detailed Solution for Olympiad Test: Integers - Question 9

45 m above sea level = +45
25 m below sea level = -25
Therefore, 45 - (-25) = 70

Olympiad Test: Integers - Question 10

−2 × (−1) = ?

Detailed Solution for Olympiad Test: Integers - Question 10

 -2 x (-1) = 2 [∵ (-) x (-) = +]

Olympiad Test: Integers - Question 11

25 ÷ −5 = ?

Detailed Solution for Olympiad Test: Integers - Question 11

25 ÷ -5 = - 5 [∵ (+/-) = -]

Olympiad Test: Integers - Question 12

At Shimla, temperature was -5°C on Monday and then it dropped by 2°C on Tuesday. What was the temperature of Shimla on Tuesday?

Detailed Solution for Olympiad Test: Integers - Question 12

Temperature on Monday = -5°C
Temperature on Tuesday = Temperature on Monday - 2°C = -5°C - 2°C = -7°C

Olympiad Test: Integers - Question 13

6 × (−15 + 10) = ______

Detailed Solution for Olympiad Test: Integers - Question 13

According to BODMAS,
6 × (−15 + 10) = 6 × (-5) = -30
[∵ -15 + 10 = -5]

Olympiad Test: Integers - Question 14

(-1) × (-1) × (-1) × ......... (2m + 1) times, where m is a natural number, is equal to:

Detailed Solution for Olympiad Test: Integers - Question 14

If negative terms are multiplied odd times, then the result will always be negative.

Thus option B is correct.

Olympiad Test: Integers - Question 15

Manish deposits Rs 2000 in his bank account and withdraws Rs 1000 from it, the next day. Find the balance in Manish’s account after the withdrawal.

Detailed Solution for Olympiad Test: Integers - Question 15

Manish deposits amount = 2000
Manish withdraws amount = -1000
Balance of Manish's account = 2000 + (-1000) = Rs 1000

Thus option C is correct.

Olympiad Test: Integers - Question 16

−(−2) × (3 + 5) = ________

Detailed Solution for Olympiad Test: Integers - Question 16

According to BODMAS,
- (-2) × (3 + 5) =  2 x 8 = 16 

Olympiad Test: Integers - Question 17

Which of the following statements is wrong?

Detailed Solution for Olympiad Test: Integers - Question 17

When a positive integer and a negative integer are added, we may either get a negative integer or positive integer.
Example: 
 
5 + (-2) = 3
2 + (-5) = -3

Olympiad Test: Integers - Question 18

(−12 - 3) ÷ (− 6 + 3) = _________

Detailed Solution for Olympiad Test: Integers - Question 18

(−12 - 3) = -15
(− 6 + 3) = -3
⇒ (−12 - 3) ÷ (− 6 + 3) = (-15) ÷ (-3) = 5

Olympiad Test: Integers - Question 19

If a = 20, b = 40 and c = 80 then a x b + a x c must be equal to

Detailed Solution for Olympiad Test: Integers - Question 19

a = 20, b = 40, c = 80

According to BODMAS,
a x b + a x c = 20 x 40 + 20 x 80 = 800 + 1600 = 2400

Olympiad Test: Integers - Question 20

The product of -140 and +8 is

Detailed Solution for Olympiad Test: Integers - Question 20

 -140 x 8 = -1120

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