Question

find the value of a such that the number 1245a is a multiple of 9 .​

Answer 1

Answer:

Step-by-step explanation:

1245a is a no. divisible by 9

hence

if the sum of the digits of the no. is divisible by 9 then that no. is also divisible by 9

1245a

sum of digits= 1+2+4+5+a=12+a

the nearest no. to 12 which is divisible by 9 is 18 so

12+a should be 18

a=6

Answer 2

the value of a is 6.

Sum of the given digits =12

But 12 is not divisible by 9 therefore to make it a multiple of 9. simply add 6 to it =12+6=18

and 18 is divisible by 9