Question

if 3+18=8,4+28=9,5+6=11 then,6+66=?​

Answer 1

5+6=11

therefore

6+66=72

Answer 2

Ok.

There is a simple logic here.

3 + 18 is actually 21

But in the question it is given 8

Which is (21 - 13)

Yes the actual answer is subtracted by 13 each time.

Now in second case

4 + 28 is actually 32

But answer given is 19

Which is (32 - 13) this tells us that only unit digit should be written

Now in third case

5 + 6 is 11

And answer is 11

Which means that the answer will not be subtracted if answer is smaller than 13. Also if there is a case like this then the whole no. should be written.

Now finally

6 + 66 is actually 72

72 - 13 = 59

Then the unit no. is 9

The answer should be 9

Hope this is correct...