Question 1055795
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23, that's the 1st and 2nd prime numbers 2,3, put together side by side

35, that's the 2nd and 3rd prime numbers 3,5, put together side by side

57, that's the 3rd and 4th prime numbers 5,7 put together side by side

711, that's the 4th and 5th prime numbers 7,11 put together side by side

1113, that's the 5th and 6th prime numbers 11,13 put together side by side

"solve these sum"  <-- that makes no sense, sorry.
Edwin</pre>