Verbal Reasoning - Series Completion - Discussion
Discussion Forum : Series Completion - Section 3 (Q.No. 2)
Directions to Solve
In this type of questions, one term in the number series is wrong. Find out the wrong term.
2.
6, 15, 35, 77, 165, 221
Answer: Option
Explanation:
The terms of the series are products of two consecutive prime numbers i.e. (2 x 3),
(3 x 5), (5 x 7), (7 x 11),.....
So, 165 is wrong and must be replaced by (11 x 13) i.e. 143.
Discussion:
3 comments Page 1 of 1.
Sumanthkvns said:
1 decade ago
If you didn't display d options, the other answer will b 221.
Lets say 6 is base value.
(6+6) = 12.
(15+15) = 30.
(35+35) = 70.
(77+77) = 154.
When these results are added with the prime number i.e. 3, 5, 7, 11 we will get the next number in the series.
It will not hold good for 221:
(165+165) = 330
So, 221 can b an answer.
Lets say 6 is base value.
(6+6) = 12.
(15+15) = 30.
(35+35) = 70.
(77+77) = 154.
When these results are added with the prime number i.e. 3, 5, 7, 11 we will get the next number in the series.
It will not hold good for 221:
(165+165) = 330
So, 221 can b an answer.
Rana Junaid said:
3 years ago
Explain it.
Why 165?
11*15 = 165.
Why 165?
11*15 = 165.
Rana Junaid said:
3 years ago
The Correct answer is 221.
11 * 20 = 220.
11 * 20 = 220.
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