Verbal Reasoning - Series Completion - Discussion
Discussion Forum : Series Completion - Section 3 (Q.No. 22)
Directions to Solve
In this type of questions, one term in the number series is wrong. Find out the wrong term.
22.
1, 3, 10, 21, 64, 129, 356, 777
Answer: Option
Explanation:
The correct pattern is x 2 + 1, x 3 + 1, x 2 + 1, x 3 + 1,.....
So, 356 is wrong and must be replaced by (129 x 3 + 1) i.e. 388.
Discussion:
2 comments Page 1 of 1.
Prasad Chowadry said:
1 decade ago
1=1.
1*2+1=3.
3*3+1=10.
10*2+1=21.
21*3+1=64.
64*2+1=129.
129*3+1=388.
388*2+1=777.
Instead of 388 he gives 356 in this series.
In this we have to multiply 2 & 3 alternatively and add 1 to the previous result.
1*2+1=3.
3*3+1=10.
10*2+1=21.
21*3+1=64.
64*2+1=129.
129*3+1=388.
388*2+1=777.
Instead of 388 he gives 356 in this series.
In this we have to multiply 2 & 3 alternatively and add 1 to the previous result.
Janardhan said:
1 decade ago
Can you please briefly, I didn't understand for above explanation.
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