Grade 7 : Mathematics (Ganita Prakash) - 10. Integers (Set 2) | Concept of Maths

Question 1

At 6:00 AM, the temperature in Leh was $-7^\circ C$. By noon, it rose by $12^\circ C$, and by 10:00 PM, it fell by $8^\circ C$. What was the final temperature?

Accepted Answer

B) $-3^\circ C$

Answer

A) $-1^\circ C$

Answer

C) $5^\circ C$

Answer

D) $17^\circ C$

Question 2

A submarine is positioned 550 meters below sea level. If it ascends 180 meters and then descends 70 meters, what is its final depth relative to sea level?

Accepted Answer

C) -440 m

Answer

A) -300 m

Answer

B) -370 m

Answer

D) -800 m

Question 3

In a competitive exam, +4 marks are given for every correct answer and -2 marks for every incorrect answer. If Sneha gets 15 correct and 10 incorrect answers, her total score is:

Accepted Answer

A) 40

Answer

B) 50

Answer

C) 60

Answer

D) 80

Question 4

A merchant earns a profit of ₹2 on every blue pen and suffers a loss of ₹1 on every red pen. If he sells 50 blue pens and 75 red pens in a day, his net profit/loss is:

Accepted Answer

D) Profit of ₹25

Answer

A) Profit of ₹175

Answer

B) Loss of ₹175

Answer

C) Loss of ₹25

Question 5

An elevator descends into a mine shaft at a rate of 8 m/min. If the descent starts from 20 m above ground level, how long will it take to reach -380 m?

Accepted Answer

C) 50 minutes

Answer

A) 45 minutes

Answer

B) 47.5 minutes

Answer

D) 60 minutes

Question 6

Which of the following illustrates the Distributive Property of multiplication over addition for integers?

Accepted Answer

B) $-2 	imes (5 + 8) = (-2 	imes 5) + (-2 	imes 8)$

Answer

A) $-5 	imes (-3) = -3 	imes (-5)$

Answer

C) $-4 + (7 + 2) = (-4 + 7) + 2$

Answer

D) $-6 	imes 1 = -6$

Question 7

If the product of two integers is -144 and one of them is 12, find the other integer.

Accepted Answer

A) -12

Answer

B) 12

Answer

C) -156

Answer

D) 132

Question 8

What is the sign of the product if we multiply 21 negative integers and 5 positive integers?

Accepted Answer

D) Negative

Answer

A) Positive

Answer

B) Zero

Answer

C) Depends on the values

Question 9

The sum of two integers is -35. If one of them is 15, what is the other?

Accepted Answer

B) -50

Answer

A) -20

Answer

C) 50

Answer

D) 20

Question 10

Simplify: $(-25) imes [(-4) + (-2)]$

Accepted Answer

C) 150

Answer

A) -150

Answer

B) 50

Answer

D) -50