Secondary School (English Medium) (5 to 8) कक्षा ८ - CBSE Question Bank Solutions

Carry out the following divisions:

34x³y³z³ ÷ 51xy²z³

Carry out the following divisions:

12a⁸b⁸ ÷ (−6a⁶b⁴)

If 21y5 is a multiple of 9, where y is a digit, what is the value of y?

If 31z5 is a multiple of 9, where z is a digit, what is the value of z? You will find that there are two answers for the last problem. Why is this so?

If 24x is a multiple of 3, where x is a digit, what is the value of x?

(Since 24x is a multiple of 3, its sum of digits 6 + x is a multiple of 3; so 6 + x is one of these numbers: 0, 3, 6, 9, 12, 15, 18…. But since x is a digit, it can only be that 6 + x = 6 or 9 or 12 or 15. Therefore, x = 0 or 3 or 6 or 9. Thus, x can have any of four different values)

If 31z5 is a multiple of 3, where z is a digit, what might be the values of z?

Write the additive inverse of each of the following rational numbers:

Write the additive inverse of each of the following rational numbers:

Write the additive inverse of each of the following rational numbers:

Write the additive inverse of each of the following rational numbers:

Write the negative (additive inverse) of each of the following:

Write the negative (additive inverse) of each of the following:

Write the negative (additive inverse) of each of the following:

Write the negative (additive inverse) of each of the following:

Write the negative (additive inverse) of each of the following:

Write the negative (additive inverse) of each of the following:
1

Write the negative (additive inverse) of each of the following:
 −1

Find the smallest number by which the given number must bew multiplied so that the product is a perfect square: 

 23805 

Find the smallest number by which the given number must bew multiplied so that the product is a perfect square: 

12150 

Find the smallest number by which the given number must bew multiplied so that the product is a perfect square: 

7688