Question

how many prime numbers from 1 to 100 are the whose digits when interchanged give a prime number
1) 10 2) 11 3) 8 4) 9
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Answer 1

Answer:

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gi.rls joi.n for study here i am also a girl here we study girl is allowed here boy are not allowed here we only study so co.me for study in me.et.ing gir.ls co.me for study here its boys disturb me.eting so boys not allowed girls is allowed i am also a girl its a safe me.et.ing

Answer 2

Answer:

11, 13, 17, 31, 37, 71, 73, 79, 97

Explanation:

Tens digit being a multiple of 2 or 5 can give a composite number when interchanged.