Number Play Class 8 Long Question Answer

Number Play Class 8 Long Question Answer

Number Play Class 8 Long Question Answer

Question 1.

Find whether the number 4815 is divisible by 11 or not. If not, find the remainder when it is divided by 11.

Solution:

Alternate sum of the digits = 4 + 1 = 5 and 8 + 5 = 13.

Their difference = 13 - 5 = 8.

So, the number 4815 is not divisible by 11. The remainder is (-4 × 1) + (8 × 1) + (-1 × 1) + (5 × 1) = 8.

Question 2.

then find the values of A, B and C.

Solution:

Considering B × 5 = B, B can be 0 or 5.

With B = 0, we have :

This gives

That is A = 5, B = 0 and C = 2.

With B = 5, we have :

This gives

That is A = 2, B = 5 and C = 1.