Question

1,6,15,28,x .what is ' x' in this series?

Answer 1

x is 45 because the difference between 1-6 is 5 the diffrence b/w 6-15 is 9 the diffrence b/w 15-28 is13 the next number diffrence should be 17 because 5-9 9-13 13-17 the difference is 4