7th Grade > Mathematics
INTEGERS MCQs
Total Questions : 115
| Page 3 of 12 pages
Answer: Option B. -> False
:
B
It is not always true. If one of the integers a is negative and the other one b is positive, then their product will be a negative integer, which is less than b.
Let's take an example:-4, 8
=−4×8
=−32
=−32<8
:
B
It is not always true. If one of the integers a is negative and the other one b is positive, then their product will be a negative integer, which is less than b.
Let's take an example:-4, 8
=−4×8
=−32
=−32<8
Answer: Option A. -> -15
:
A
Let the number be a.
⇒ 16=−240a
⇒ a=−24016=−15
Hence,-240 should be divided by -15 to obtain 16.
:
A
Let the number be a.
⇒ 16=−240a
⇒ a=−24016=−15
Hence,-240 should be divided by -15 to obtain 16.
Answer: Option C. -> −b
:
C
Here, for any integer b,
b−1=−b.
:
C
Here, for any integer b,
b−1=−b.
:
The product of three negative integers is negative.
For example, −2×−1×−3=−6
Answer: Option A. -> 40 km South
:
A
Let's assume a car travelling toward North as positive and South as negative.
+60 + (- 100) = - 40. The car is 40 km South from point A.
:
A
Let's assume a car travelling toward North as positive and South as negative.
+60 + (- 100) = - 40. The car is 40 km South from point A.
Answer: Option C. -> Does not have any sign
:
C
Zero has no sign. It isneither positive nor negative.
:
C
Zero has no sign. It isneither positive nor negative.
:
Let the number in blank be x.
According to question,
x + 23 = 0
So, x = 0 - 23 = - 23
:
Given,x % y = x + y - xy
Therefore, x = 13 and y = 7
13 % 7 = 13 + 7 - 13 × 7 = -71
:
LHS =
8+ (-13) - 15= 8 + (-28) = -20
RHS =
-15 + (-39) + 6 = -54 + 6 = -48
-20 >-48
∴8+ (-13) - 15is greater than-15-39+ 6
Answer: Option C. -> Not defined
:
C
For any integer a, a ÷ 0 is not defined.
We know that, division is a repeated subtraction.
For example 15÷3 is
15-3 = 12
12-3 = 9
9-3 = 6
6-3 = 3
3-3 = 0
Therefore, 15÷3 = 5.
Similarly15 ÷ 0 is
15 - 0 = 15
15 - 0 = 15
15 - 0 = 15
15 - 0 = 15 and so on ...
Therefore, division of an integer by 0 is not defined.
:
C
For any integer a, a ÷ 0 is not defined.
We know that, division is a repeated subtraction.
For example 15÷3 is
15-3 = 12
12-3 = 9
9-3 = 6
6-3 = 3
3-3 = 0
Therefore, 15÷3 = 5.
Similarly15 ÷ 0 is
15 - 0 = 15
15 - 0 = 15
15 - 0 = 15
15 - 0 = 15 and so on ...
Therefore, division of an integer by 0 is not defined.
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