Question

a4273b is a six digit number in which a and b are digits. This number is divisible by 72. Then

(1) b - 2a = 0
(2) a - 2b = 0
(3) 2a - b = 4
(4) a + b = 13​

Please give me step by step explanation​

Answer 1

Answer:

we know 72=8*9

then the given no. will be devide by respectively 8&9

then first we see valve of b that means devide rule of 8

the value of b is 6

then the value of a will be 5

so the finally option 3 is right one

2a-b=4

put the value

2*5-6=4

10-6=4

finally

4=4