Question

p,q and r are prime numbers such that p<q<r<13 . In how many

cases would (p+q+r) also be a prime number?​

Answer 1

Answer:

ans: 2

Step-by-step explanation:

p, q and r are prime numbers

Given that p < q < r < 13

Cases in which (p + q + r) is prime no. = 5+7+11 = 23 or 3+5+11 = 19 (where 23 & 19 prime no.)

There are only two such cases possible

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