Question

if 7251z39 is a multiple of 11 where z is a digit what is the value of z ?


Note:Need the whole process please​

Answer 1

Answer:

z=7

Explanation:

We know the divisibility rule for 11:

If the difference of the sum of its digits at odd places and sum of its digits at even places is either 0 or a number divisible by 11.

278366:

Sum of the odd places =2+8+6=16

Sum of the even places =7+3+6=16

Difference =16−16=0

So, 278366 is divisible by 11.

The value of z is 6.