1 a bb ccc dddd eeeee ffffff zzz what is 120 th letter

series:1,2,3,4,5.....
So,
120=1+2+3+...+N
let N=15
n=n*(n+1)/2
=15*16/2
=120
N=15
15th letter is "O".

Ans: O
9 years agoHelpfull: Yes(9) No(1)
Series is like:1,2,3,4,5,6,7,8,.................26
so Given number=120
for that we have to guess on which number it falls by formula:Sum=n*(n-1)/2
I think 16th number ll give proper position i,e 16*(15)/2=120
So on 16th position 'P'will fall,
So my ans is ''P''.
9 years agoHelpfull: Yes(7) No(6)
answer 'k'
9 years agoHelpfull: Yes(2) No(3)
answer is "k"
9 years agoHelpfull: Yes(1) No(6)
p 120 times
104=z
and later on count to 120 again from a
8 years agoHelpfull: Yes(0) No(3)
a -1
b -2
c -3
.
.
.
and so on up to n - 14 .. total sum= 105
o - 15 ==105+15 =120
ans is "o"
8 years agoHelpfull: Yes(0) No(1)
series is : 1,2,3,4,5.........
So
120= nx(n+1)/2
or 240=15x16
so n=15
since the 15th letter is "O"...hence the answer will be "O".
6 years agoHelpfull: Yes(0) No(0)
Out of 26 letters "a" is the 1st one hence there is only "a" similar way "b" is 2nd therefore "bb".
In this way we will reach the 120th letter by adding the letters of the given sequence up to 15th letter i.e
1+2+3+4+......+15=120 , which is "o".
Therefore the answer is letter "o"
2 Months agoHelpfull: Yes(0) No(0)

1) a,bb,ccc,dddd,eeeee,ffffff,........................zzz
what is 120 th letter