Question

A bb ccc dddd eeeee.. What is the 120th letter?

Answer 1

Step-by-step explanation:

alphabet are written in increasing number of alphabet every time.

there is series of 1,2,3,4 ..... and so on

as we have to find 120th letter of this series . we found the sum of that A.P.

so

120 = n(n+1) / 2

⇒240=n²+n

⇒n²+n-240=0

⇒n²+16n-15n-240=0

⇒n(n+16)-15(n+16)=0

⇒(n+16)(n-15)=0

n= 15 , -16

as -16 is not possible so n= 15

so 15th letter of alphabetical series will be 120th letter which is 'o'

Answer 2

Answer:

Hey mate plzz refer to the attachment.