IBM
Company
Logical Reasoning
Number Series
What is the next number of the following sequence?
1,11,21,1211,111221...?
Read Solution (Total 11)
-
- 1 is read off as "one 1" or 11.
11 is read off as "two 1s" or 21.
21 is read off as "one 2, then one 1" or 1211.
1211 is read off as "one 1, then one 2, then two 1s" or 111221.
111221 is read off as "three 1s, then two 2s, then one 1" or 312211. - 10 years agoHelpfull: Yes(74) No(1)
- The next no. simply tells how many times a digit is appearing in the previous number.
For eg. 1, then here we have a single 1. So, the next number in the sequence is 11.
now, 11 has two 1's. so,nwext in sequence is 21.
Similarly, after 111221 we'll get 312211 - 10 years agoHelpfull: Yes(10) No(1)
- Interestingly.. this series is forming fibonacci series also..
1 + (1+1) = 3 = (2+1)
(2+1) + (1+1) = 5 = (1+2+1+1)
(1+2+1+1) + (2+1) = 8 = (1+1+1+2+2+1) - 9 years agoHelpfull: Yes(3) No(0)
- 1,11,21,1211,111221...?
next number will be
312211 - 10 years agoHelpfull: Yes(2) No(1)
- Whoa..!
It is the best series i came across...
- 9 years agoHelpfull: Yes(2) No(0)
- aaaiiiyyyooooo.............mazedaar!!!!! kash sara ques esa hota
- 9 years agoHelpfull: Yes(2) No(2)
- Ans-312211
(Three 1,Two 2,one 1)
The series is going on like--1,11 (one 1),21(two 1),1211(one 2, one 1),111221(one 1,one 2,two 1) - 10 years agoHelpfull: Yes(1) No(0)
- wow !what a series...........
- 9 years agoHelpfull: Yes(1) No(0)
- 1 is read off as "one 1" or 11.
11 is read off as "two 1s" or 21.
21 is read off as "one 2, then one 1" or 1211.
1211 is read off as "one 1, then one 2, then two 1s" or 111221.
111221 is read off as "three 1s, then two 2s, then one 1" or 312211. - 8 years agoHelpfull: Yes(1) No(0)
- 312211 is the answer
- 9 years agoHelpfull: Yes(0) No(0)
- awsum series....
- 9 years agoHelpfull: Yes(0) No(0)
IBM Other Question
A manufacture of printer toner adjusts its price of color toner from $33 to $35 a cartridge and the price of standard black ink toner from $29 to $30 a cartridge if a document printing center spends an average of $1555 a month for toner of which 3/5 is for color cartridges how much more per month will the printing center spent?
1) 3,7,10,8,4,12,0,5,5,3,2,?
2) 11,8,17,14,23,24,31,32,?
3) 5,10,9,3,6,5,4,8,7,?
4)13,14,15,16,18,19,20,22,23,?
5) 0.8,1.8,3.6,4.6,9.2,9.2,10.2,?
6)12,3,15,14,6,19,16,9,23,18,12,?
7) 49,6,25,4,36,5,81,?
8)0.5,2,3,4.5,6.75,?
9) 1,9,0,2,7,1,3,5,2,4,3,?
10) 3,2,1,4,5,4,5,1,0,6,3,?
11) 1/7,3/4,4/9,5/6,7/11,7/8,?
12) 1,1,1,2,4,12,36,?
13)24,42,1/2,2,65,56,6/5,5/6,73,37,7/3,?
14) 1,2,2,4,8,1,8,1/2,4,1,4,4,?
15) 3,4.5,7,4,6,8.5,5,7.5,10,6,?
16) -27,9,-3,81,-27,9,54,?
17) 56,89,33,21,57,88,35,19,60,85,39,15,?