Question

3. The number 7249x4 is divisible by 4, where x is a non-zero digit. Find all possible values of x.​

Answer 1

Given,

The number is = 7249x4

Its divisible by 4.

To find,

The value of x.

Solution,

We can simply solve this mathematical problem by using the following mathematical process.

According to the divisible by 4 rule, the number formed by last two digits of a number will be divisible by 4 if the whole number is divisible by 4.

Here,

The number by last 2 digits = x4

Now, x can have values from 1 to 9

So, numbers can be

14,24,34,44,54,64,74,84,94

Divisible by 4 numbers = 24,44,64,84

Probable values of x = 2 or 4 or 6 or 8

Hence, all possible values of x will be 2,4,6 or 8.