Question

if 4a3b is divisible by 11 find the possible value of a+b
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Answer 1

The difference between the sum of odd and Even places should be divisible by 11

4+a+3+b= 11

a+b= 11-7

a+b= 4

or

4+a+3+b= 22

a+b= 22-7

a+b= 15

value of a+b could be 4 or 15

Answer 2

I hope this helps !!!