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Write five pairs of prime numbers less than 20 whose sum is divisible by 5 . (Hint : \( 3+7=10 \) )
To do :
We have to find write five pairs of prime numbers less than 20 whose sum is divisible by 5.
Solution :
The five pairs of prime numbers less than 20 whose sum is divisible by 5 are:
$2 + 3 = 5$
$2 + 13 = 15$
$3 + 7 = 10$
$3 + 17 = 20$
$7 + 13 = 20$
$11 + 19 = 30$
$13 + 17 = 30$
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