Question

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
Please answer and EXPLAIN.​

Answer 1

Answer:

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