Question

1,6,15,?,45,66,91.
Find the missing series?
Please explain this problems

explain this problems

Answer 1

28 is the answer hope it helps u please mark me as a brainlist

Answer 2

The answer is 28..

1+5= 6

6+9= 15

15+13= 28

28+17= 45

45+21= 66

66+25= 91

Observe the odd numbers which are added in each case... They are the odd numbers which is obtained by adding 4 to the previous odd number in previous case...

Hope u are helped...