abbcccdddd......
find the 288 th letter

• 1+2+3.....
  288=n/2(1+(n-1)1)
  288=n^2/2
  n=(576)^1/2=24 , and 24th letter is x
  Ans is X
• 9 years agoHelpfull: Yes(19) No(1)
• n(n+1)/2
  20(20+1)/2=210
  22(22+1)/2=253=v
  23(23+1)/2=276=w
  24(24+1)/2=300=x
  so 288 number is x
• 9 years agoHelpfull: Yes(9) No(1)
• by n(n-1)/2;if n=23, 23(24)/2=276 &if n=24, 24(25)/2=300
  we need 288th letter so n=24, letter is X
• 9 years agoHelpfull: Yes(2) No(0)
• ans will be x
  
  1+2+3+...............+23=276
  and position of 23 is w
  and after that 24 character for x.
  so 288 position contain x.
  
• 9 years agoHelpfull: Yes(1) No(0)
• A.P SERIES 1+2+3+4......
  Sn=288=n/2{1st term+(n-1)*difference b/w two terms} n= th term out of 26 alphabet
  => 288*2=n^2
  => n=24 hence 24th alphabet or 288th letter is 'x'
• 7 years agoHelpfull: Yes(1) No(0)
• Ans-w
  1+2+3+4+....
  by trial and error method n(n+1)/2 we see 23(24)/2=276.so 23 means w
• 9 years agoHelpfull: Yes(0) No(2)
• 1+2+3....+26= n*(n+1)/2=26*25/2=351 => 351-288=63 rd letter from the end ..so 26(z)+25(y)=51 so "x" is the answer
• 9 years agoHelpfull: Yes(0) No(0)
• dre r 26 letters nw (288/26)=11+ 2 as a remainder so its wld be M
• 9 years agoHelpfull: Yes(0) No(3)
• x is the 288 th letter
  
• 9 years agoHelpfull: Yes(0) No(0)
• 24 by hit and try
• 9 years agoHelpfull: Yes(0) No(0)
• x is the 288th letter
  
• 9 years agoHelpfull: Yes(0) No(0)