Question

Multiplying 21978 by what number gives you 21978 in reverse?
4
5
6
7

Answer 1

Multiplying 21978 by 4 gives you 21978 in reverse.

Given:

Multiplying 21978 by what number gives you 21978 in reverse?

To find:

The required number

Solution:

let the number be p

Multiplying 21978 by what number gives you 21978 in reverse?

Multiply 21898 by "P"

=> 21978 x P

Given resultant number is 21978 (In reverse)

=> The reverse number of 21978 is 87912.

According to the given question:

=> 21978 x P = 87912

=> P = 87912/21978

=> P = 4.

Hence, The required number is 4.

Answer 2

Answer:

• 4

Step-by-step explanation:

Given

• A number (x) and 21978 are multiplied and the product so formed is 21978 in reverse that is 87912.

To find

• The number (x)

Solution

⟹ 21978 × x = 87912

⟹ x = 87912/21978

⟹ x = 4

Hence, 4 is the number that shall be multiplied with 21978 to obtain 21978 in reverse.