Question

answer to this question.....​

Answer 1

Answer:

Step-by-step explanation:

since a3b is an even number. therefore,

if it has to be divisible by 5, then b must be 0 or 5. but it is an even number. therefore b must be equal to 0

b=0

now, the number looks like a30, now if it has to be divisible by 3, then the sum of the digits of this number must be divisible by 3

a+3+0 must be divisible by 3 and the number must be greatest one

so a must be 9

930 is the number

 ii)  2ab2a

again a at the unit place must be 0, since it is divisible by 5 and an even number at the same time.

20b20 is the number

now itmust be divisible by 3 and must be a greatest number

therefore b must be 8

20820 is the number