Question

if 15Z7 is a multiple of 3 where Z is a digit find the value of Z
​

Answer 1

Answer:

acc. to divisibility rule of 3

sum of digits should be the multiple of 3 therefore, we have 15Z7

1+5+Z+7= 13+Z

to make it multiple of 3 it should also come in table of 3

so after 13 it can be nearest to 15

15-13=Z

2=Z

hence answer is 2

Answer 2

the answer is in the image.