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Assertion and Reason Questions Class 8 Maths Chapter 7 Cubes and Cube Roots
1.) Assertion (A) – 125 is a perfect cube
Reasons (R) –The perfect cube is the result of multiplying the same integer three times.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
2.) Assertion (A) –400 is a perfect cube
Reasons (R) –The perfect cube is the result of multiplying the same integer three times.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
3.) Assertion (A) –1000 is a perfect cube
Reasons (R) –The perfect cube is the result of multiplying the same integer three times.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
4.) Assertion (A) –27 is a cube number
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
5.) Assertion (A) –99 is not a perfect cube
Reasons (R) –The perfect cube is the result of multiplying the same integer three times.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
6.) Assertion (A) –10000 is not a cube number
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
7.) Assertion (A) –The cube of an odd natural number is odd
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
8.) Assertion (A) –The cube of an even natural number is even
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
9.) Assertion (A) –The one’s digit of the cube of the number 111 is 2
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
10.) Assertion (A) –The one’s digit of the cube of the number 242 is 4
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
11.) Assertion (A) –The one’s digit of the cube of the number 123 is 7
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
12.) Assertion (A) –The one’s digit of the cube of the number 144 is 4
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
13.) Assertion (A) –The one’s digit of the cube of the number 50 is 2
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
14.) Assertion (A) –The one’s digit of the cube of the number 326 is 6
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
15.) Assertion (A) –The one’s digit of the cube of the number 325 is 0
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
16.) Assertion (A) –The one’s digit of the cube of the number 347 is 7
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
17.) Assertion (A) –The one’s digit of the cube of the number 249 is 9
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
18.) Assertion (A) –the one’s digit in the cube root of the cube number 1331 is 1
Reasons (R) –The cube root of a number is the factor that we multiply by itself three times to get that number.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
19.) Assertion (A) –the one’s digit in the cube root of the cube number 1000000 is 0.
Reasons (R) –The cube root of a number is the factor that we multiply by itself three times to get that number.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
20.) Assertion (A) –the one’s digit in the cube root of the cube number 1728 is 6
Reasons (R) –The cube root of a number is the factor that we multiply by itself three times to get that number.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
21.) Assertion (A) –the one’s digit in the cube root of the cube number 2197 is 3
Reasons (R) –The cube root of a number is the factor that we multiply by itself three times to get that number.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
22.) Assertion (A) –The number of zeroes at the end of the cube of the number 20 is 3
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
23.) Assertion (A) –The number of zeroes at the end of the cube root of the cube number 1000 is 1
Reasons (R) –The cube root of a number is the factor that we multiply by itself three times to get that number.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
24.) Assertion (A) –The number of zeroes at the end of the cube of the number 100 is 4
Reasons (R) –A cube number is a number multiplied by itself 3 times
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
25.) Assertion (A) –The number of zeroes at the end of the cube root of the cube number 8000000 is 3
Reasons (R) –The cube root of a number is the factor that we multiply by itself three times to get that number.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
26.) Assertion (A) –the smallest number by which the number 108 must be multiplied to obtain a perfect cube is 3.
Reasons (R) –The perfect cube is the result of multiplying the same integer three times.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
27.) Assertion (A) –the smallest number by which the number 250 must be divided to obtain a perfect cube is 2.
Reasons (R) –The perfect cube is the result of multiplying the same integer three times.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
28.) Assertion (A) –the smallest number by which the number 72 must be multiplied to obtain a perfect cube is 3.
Reasons (R) –The perfect cube is the result of multiplying the same integer three times.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
29.) Assertion (A) –the smallest number by which the number 375 must be divided to obtain a perfect cube is 3.
Reasons (R) –The perfect cube is the result of multiplying the same integer three times.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
30.) Assertion (A) – the smallest number by which the number 100 must be multiplied to obtain a perfect cube is 5.
Reasons (R) –The perfect cube is the result of multiplying the same integer three times.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
Answers:
1:a 2:d 3:a 4:a 5:d 6:d
7:b 8:b 9:d 10:d 11:a 12:a
13:d 14:a 15:d 16:a 17:a 18:a
19:a 20:d 21:a 22:a 23:a 24:d
25:d 26:d 27:a 28:a 29:a 30:d