Pattern recognition is hard!

Pattern recognition is a very hard part of Math and Logic. Unfortunately pattern recognition hepls us to find recursive or explicite formulas for a given series. Sometimes it only inspires us to find the way, which leads us to the formula.

I believe, that there is no recursive or explicite formula for this series:

2 ; 3 ; 5 ; 7 ; 23 ; 37 ; 53 ; 73 ; 223 ; 227 ; 233 ; 257 ; 277 ; 337 2;3;5;7;23;37;53;73;223;227;233;257;277;337

What is the next number ?


The answer is 353.

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1 solution

CodeCrafter 1
Jun 8, 2019

First you can recognize, that these numbers are all primes.

Then you can recognize, that these primes only use primes as digits ( 2 ; 3 ; 5 ; 7 ) (2;3;5;7)

Thus the next number is 353 \boxed{353}

See here

Why can't be 257?

Piyush Patnaik - 1 year, 11 months ago

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Because 257 is smaller than 337. And this number is already in the list.

CodeCrafter 1 - 1 year, 11 months ago

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ooh ya i got it now its visible in website version but last few nos are not visible in android app

Piyush Patnaik - 1 year, 11 months ago

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