Algebra Play Class 8 MCQ

Algebra Play Class 8 MCQ

Algebra Play Class 8 MCQ

Question 1.

Difference of a two-digit number and the number obtained by reversing its digits is divisible by

(a) 6

(b) 9

(c) 11

(d) 13

Answer:

(b) 9

Question 2.

Sum of a two-digit number and the number obtained by reversing its digits is divisible by

(a) 3

(b) 6

(c) 9

(d) 11

Answer:

(d) 11

Question 3.

If the calendar grid of size 2 × 2, the smallest number is 5, then sum of the four numbers is

(a) 36

(b) 35

(c) 32

(d) 30

Answer:

(a) 36

Question 4.

If the bottom row of number pyramid is then the number at its top is

(a) 28

(b) 33

(c) 37

(d) 39

Answer:

(c) 37

Question 5.

What will be the number at top when the bottom row of a number pyramid is

(a) 61

(b) 65

(c) 67

(d) 69

Answer:

(d) 69

Case Study

Question 1.

Numbers and Digits

It is known that a, b and c are three digits.

(а) What is the number represented by abc ?

(b) What is the number represented by bca ?

(c) What is the number represented by cab ?

(d) What is the sum of these three numbers ?

(e) This sum is divisible by

(i) 5

(ii) 7

(iii) 11

(iv) 37

Answer:

(a) 100a + 10b + c

(b) 100b + 10c + a

(c) 100c + 10a + b

(d) 111(a + b + c)

(e) (iv)

Question 2.

(a) On reversing the digits, the number 92 becomes 29. What is the difference of these numbers ?

(b) Is this number divisible by 3 ?

(c) Is this number divisible by 9 ?

(d) Is this number divisible by 2 ?

(e) Is this number divisible by 7 ?

Answer:

(a) 63

(b) Yes

(c) Yes

(d) No

(e) Yes.