A two-digit number $ab$ and its reversal $ba$ are both prime. For example, $13$ and $31$ are

Question

A two-digit number $ab$ and its reversal $ba$ are both prime. For example, $13$ and $31$ are both prime. What is the largest possible sum of these two numbers $ab$ and $ba$

Accepted Answer

$176$

IP1U1 SWI Q16

IP1U1 SWI Q16

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