Question

What are all the different ways to choose the ones digit,a, in the number 572435a, so that the number will be divisible by 3?

Answer 1

Answer:3 ways

Step-by-step explanation:

Fir divisibility by 3 sum of digits should be divisible by 3

26+a=3x

a=1,4,7

Answer 2

There are 3 ways to choose the ones digit in the number 572435a.

Step-by-step explanation:

The given number is 572435a

For any number to be divisible by 3 its sum of digits should be divisible by 3.

=> 5 + 7 + 2 + 4 + 3 + 5 + a

=> 26 + a

26 + a to be divisible by 3 the value of  a are 1, 4, 7.

There are 3 ways to choose the ones digit in the number 572435a.