Question

In 439*71 , replace * by the smallest no. to make it divisible by 11

Answer 1

Answer:

Divisibility test of 11 :

Take the alternating sum of the digits in the number, read from left to right.

If it is divisible by 11 then the number too will be divisible by 11.

Step-by-step explanation:

Let's assume * to be x.

So,

4-3+9-x+7-1=16-x

So, we got 16-x as a result.

We know that 16-x is divisible by 11.

Therefore,

16-x=11    (Nearest number is 11 which is divisible by 11)

16-11=x

x=5

Hence, 5 should be replaced by * to make 439*71 to make it divisible by 11.