Verbal Reasoning - Series Completion - Discussion
Discussion Forum : Series Completion - Section 1 (Q.No. 17)
Directions to Solve
Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.
17.
2, 3, 3, 5, 10, 13, ?, 43, 172, 177
Answer: Option
Explanation:
The pattern is + 1, x 1, + 2, x 2, + 3, x 3, + 4, x 4, + 5.
So, missing term = 13 x 3 = 39.
Discussion:
8 comments Page 1 of 1.
Alee said:
4 years ago
Separate the patterns like this;
1st: 2,3,10,?,172.
2nd:3,5,13,43,177,
2+1 = 3,
3+2 = 5,
10+3 = 13,
39+4 = 43,
172+5 = 177.
2x1 = 3,
5x2 = 10,
13x3 = 39,
43x4 = 172.
So in the 1st pattern, you have to do the addition of 1st no with +1,
Also same goes for 2nd pattern you have to do multiplication 1st no with x1,
Now in 1st pattern add +2 with the answer of 2nd pattern,
And in 2nd pattern multiple x2 with the answer of 1st pattern
The sequence goes like this and you'll find your answer which is 39.
I hope it helps everyone.
1st: 2,3,10,?,172.
2nd:3,5,13,43,177,
2+1 = 3,
3+2 = 5,
10+3 = 13,
39+4 = 43,
172+5 = 177.
2x1 = 3,
5x2 = 10,
13x3 = 39,
43x4 = 172.
So in the 1st pattern, you have to do the addition of 1st no with +1,
Also same goes for 2nd pattern you have to do multiplication 1st no with x1,
Now in 1st pattern add +2 with the answer of 2nd pattern,
And in 2nd pattern multiple x2 with the answer of 1st pattern
The sequence goes like this and you'll find your answer which is 39.
I hope it helps everyone.
(2)
Raj said:
4 years ago
It's very confusing, can someone explain this clearly, please?
Rashi said:
9 years ago
Please explain clearly with other methods (logic).
Sujit kumar patel said:
10 years ago
Please explain?
Srinivas said:
1 decade ago
Break the series into two:
2 ,3 ,10,? ,172..
3 ,5 ,13,43,177..
+1,+2,+3,+4,+5..
43-4 = 39.
2 ,3 ,10,? ,172..
3 ,5 ,13,43,177..
+1,+2,+3,+4,+5..
43-4 = 39.
(2)
Prem said:
1 decade ago
2+1 = 3.
3*1 = 3.
3+2 = 5.
5*2 = 10.
10+3 = 13.
13*3 = 39.
3*1 = 3.
3+2 = 5.
5*2 = 10.
10+3 = 13.
13*3 = 39.
(2)
Anu said:
1 decade ago
2+1=3,3*1=3,3+2=5,5*2=10,10+3=13,13*3=39........
(2)
Suakritishatak said:
1 decade ago
Can anyone explain it please.
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