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Maths Puzzle
Numerical Ability
Sequence and Series
Q. Find incorrect number
7, 8, 18, 57, 228, 1165, 6996
Read Solution (Total 5)
-
- Look upon the series carefully
7,
[7+1]*1 = 8
[8+1]*2 = 18,
[18+1]*3 = 57
[57+1]*4 = 232.......
so 228 is incorrect.
[232+1]*5 = 1165
[1165+1]*6 =6996 - 10 years agoHelpfull: Yes(5) No(0)
- 228 is incorrect.
7,
(7+1)*1=8
(8+1)*2=18,
(18+1)*3=57
(57+1)*4=232....... so 228 is incorrect.
(232+1)*5=1165
(1165+1)*6=6996 - 10 years agoHelpfull: Yes(2) No(1)
- 7,7*1+1=8,8*2+2=18,18*3+3=57....thus 228 is wrong answer
- 10 years agoHelpfull: Yes(1) No(1)
- 228 is wrong.
1-->7
2-->7*1+1=8
3-->8*2+2=18
4-->18*3+3=57
5-->57*4+4=232 but here 228
6-->232*5+5=1165..
so on.... - 10 years agoHelpfull: Yes(0) No(0)
- (1*7)= 7
(1*7)+1 =8
(2*8)+2 =18
(3*18)+3= 57
(57*4)+4 =232...
So the number 228 is incorrect..
(232*5)+5 =1165... - 10 years agoHelpfull: Yes(0) No(0)
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