Question

The 260th 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

Answer:

260th term is ''w''.

Step-by-step explanation:

Let create the new sequence from

a b b c c c d d d d .......

Such that

a = 1

b , b = 2

c c c = 3

d d d d = 4

And soon

Now note that every number in the new sequence is represented that which letter of alphabets of English is present in the old sequence and how many times it appears in the old series.

Since

{(22) × (23)} / 2 = 506 / 2 =  253

And

{(23) × (24)} / 2 = 552 / 2 = 276

This implies that from 254 to 276 terms have same letter in the old sequence So 260th place symbols is 23rd alphabet of English

And 23rd letter of English alphabets is ''w''.

So 260th term is 'w'.