Question

If [42Y5] is a multiple of 9 and Y is a digit, then find The value of Y
1.7 2.8 3.9 4.6​

Answer 1

Answer:

The value of y is 7.

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Answer 2

Given:

  4 2 y 5 is a multiple of 9.

To Find:

   The value of digit y in 42y5 .​

Step-by-step explanation:

For a number to be a multiple of 9, the sum of the digits of the number should be divisible by 9.

For example:

1. 81, if we add the digits of 81 i.e., 8 + 1, we will get 9 which is divisible by so number 81 is divisible by 9.
2. Similarly for 261, if we add the digits of 261 i.e., 2 + 6 + 1, we will get 9 which is divisible by so number 261 is divisible by 9.

Now, we will find the value of y in 42y5, which is a multiple of 9.

We will add the digits of 42y5.

4 + 2 + y + 5 = 6 + y + 5 = 11 + y

11  + y ( y can be 7 so that the number could be divisible by 9 )

= 11 + 7 = 18, which is divisible by 9

Hence, the value of y is 7.

Option 1 is correct.