Question

find the odd one out (a)15 (b)45 (c)55 (d)85

Answer 1

45
Because 3*5
Difference between factor of 5 is 6(9-3)
9*5
But here the difference is not 6(11-9=2)
11*5
Difference between factor of 5 is 6(17-11)
17*5