Question

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6. (KVPY 2008) Let P1 be the set of all primes. le P1= { 2,3,5,7........},
let Pn = { n×p ; p belongs to P1} ie prime multiples of n. Then which of the following sets is
empty?
a) P1 intetsection P23
b) P7 intersection P21
c) P12 intersection P20
d) P20 intersection P24

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Answer 1

$P12 intersection P20$

$follow \: \: \: \: me$

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