TCS
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Numerical Ability
Sequence and Series
find odd one in the series?
48,38,28,24,20,18
Ans: 28
Read Solution (Total 5)
-
- Look upon the series carefully
48, 38 ,28, 24 ,20, 18
48 - 38 = 10
38 - 28 = 10
28 - 24 = 4
24 - 20 = 4
20 - 18 = 2
difference should 10,8,6,4,2
so 28 should replace with 30 - 10 years agoHelpfull: Yes(35) No(1)
- difference of two consecutive numbers decreses
from
10, 8, 6, 4 , 2 so odd is 28
- 10 years agoHelpfull: Yes(1) No(0)
- differ by -10 -8 -6 -4 -2
we can have 26 in the place of 28 - 10 years agoHelpfull: Yes(0) No(0)
- from last to, (18+2=20+4=24+6=30+8=38+10=48) add the series 2,4,6,8,10.....to the result
- 10 years agoHelpfull: Yes(0) No(0)
- 48-10=38;
38-8=30;
30-6=24;
24-4=20;
20-2=18;
so 28 is odd - 10 years agoHelpfull: Yes(0) No(0)
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