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Fill in the Gaps

Posted: Sun Feb 18, 2018 8:53 pm
by samiul_samin
Fill in the Gaps
11,31,71,...,32,92,...,73
This type of problem is confusing for me.I think it is an easy problem.

Re: Fill in the Gaps

Posted: Fri Aug 20, 2021 11:00 am
by 103568
samiul_samin wrote:
Sun Feb 18, 2018 8:53 pm
Fill in the Gaps
11,31,71,...,32,92,...,73
This type of problem is confusing for me.I think it is an easy problem.
If we look at the series of prime numbers starting from 11, we get
11, 13, 17, 19, 23, 29, 31, 37.
Now, creating a new series with the reversal term of these numbers, we get
11, 31, 71, 91, 32, 92, 13, 73.
So, the missing numbers should be 91 and 13.
Thank you