Question

The 288th term of the series a, b, b, c, c, c, d, d, d, d, e, e, e, e, e, f, f, f, f, f, f, . . . is:

Answer 1

By summation formula 1+2+3+4+....n=     We get 227th term will be X and 300th term will be Y. so 288th term is X