Question
Give three pairs of prime numbers whose difference is $2.$
$($Remark: Two prime numbers whose difference is $2$ are called twin primes$).$
$($Remark: Two prime numbers whose difference is $2$ are called twin primes$).$
✓
Answer
The three pairs of prime numbers, whose difference is $2,$ are as follows:
$3, 5; 5, 7; 11, 13.$
$3, 5; 5, 7; 11, 13.$
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