Elitmus
Exam
Numerical Ability
Sequence and Series
The series is a, zz, bbb, xxxx, what is the alphabet at the 210th position?
Read Solution (Total 14)
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- ans: q
a,zz,bbb,xxxx,ccccc,...
no. of terms in series 1,2,3,4,5,......
1+2+3+...+n = 210 => n(n+1)/2 = 210 => n = 20
i.e 20 th letter in the series is written 20 times.
series is
a, z, b, y, c, x, d, w, e, v, f, u, g, t, h, s, i, r, j, q, k, p, l, o, m, n
210th position = 20 th letter of series = q - 10 years agoHelpfull: Yes(50) No(19)
- @rakesh......series is a,z,b,x,c,v......or what u have written..a,z,b,y,c......from where y comes in it???
- 10 years agoHelpfull: Yes(16) No(2)
- ans is Z.
here asked 210th position
which must be an even placed
and decreasing order series ex.. ZZ,xxxx,vvvvv..... are on the even placed
so it is sure that 210 will be part of this series..
so 210/2=105
105 are the element in decreasing order series
105/13=8 and rem=1
so 8 group are completed and next element is= z
so ans is z upto 210 times.....
- 10 years agoHelpfull: Yes(8) No(7)
- ans:- q
210th position means sum of 20 natural numbers
so at the last of 20th character would be q only
n(n+1)/2 = 210,
n = 20,
series:- a, z, b, y, c, x, d, w, e, v, f, u, g, t, h, s, i, r, j, q, k, p, l
20th term is q. - 10 years agoHelpfull: Yes(5) No(8)
- as every one is agreed that, it will be the 2oth alphabet.
so lets count the 20th term.
a,*z,b,*x,c,*v,d,*t,e,*r,f,*p,g,*n,h,*l,i,*j,j,*h.
according to the series we r getting "h" as the 20th term, isn't it,
so Ans: h - 10 years agoHelpfull: Yes(5) No(1)
- a,zz,bbb,xxxx,ccccc,...
no. of terms in series 1,2,3,4,5,......
1+2+3+...+n = 210 => n(n+1)/2 = 210 => n = 20
i.e 20 th letter in the series is written 20 times.
series are a z b x c v d t e r f p g n h l j a z
so ans = z - 10 years agoHelpfull: Yes(4) No(5)
- ans:z
because after series completion, again starts with a,z,b,x,... In 27th position, starts with a
similarly in 209th position, there will be a, and in 210th there will be z. - 10 years agoHelpfull: Yes(3) No(8)
- yes the series will start again aftr 52 (26+26)....similarly it will end till 208 and again start at 209 which is a and 210 will b z
- 10 years agoHelpfull: Yes(3) No(5)
- Ans:- g
series is a,zz,bbb,xxxx......
so 1+2+3+..+n=210---> n=20
means 10 value will be from start and other 10 value from last so
n is even so we take value from last in alphabet
but series is zz,---,xxxx so it is 20th from last
it will be g.
- 10 years agoHelpfull: Yes(2) No(6)
- g is the right ans here zz xxxx vvvvv ...... gggggggggggggggggggg(20th term)
- 10 years agoHelpfull: Yes(2) No(6)
- answer is zzzz... (210 times)
210 is even and the alphabet series is going reverse in even places. Considering only the even places we have to find the number in 105th position.
Since there are only 26 alphabets mod(105/26) = 1 i.e z - 10 years agoHelpfull: Yes(1) No(3)
- not x question is azzbbbyyyy..... what is 201th term??
- 10 years agoHelpfull: Yes(0) No(2)
- i find rakesh's explanation acceptable but he didnt get the series.. only one person got the series..
a,z,b.x.c,v,d,t,e,r,f,p,g,n,h,l,i,j, again j, and h. is the 20th term...
none said nothing about not repeating...
and well will going reverse for the series for the even places u have jump one alphabet....
- 9 years agoHelpfull: Yes(0) No(0)
- answer should be h
series is a,zz,bbb,xxxx,ccccc,....
so the 210 element will be 20 alphabet
so 1(because of a),z,y(omit y or odd alphabet),x,w,v.....j,i,h(20th element)
so answer is h - 7 years agoHelpfull: Yes(0) No(0)
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