let the smallest number be n .
n has to be of the form p1*7*p2.
(n/p1*7) would result in p2 . since p1 and 7 cannot be further broken down
a.7 p1=1 ,gives result 1=(not prime) false
b.14 p1=2 ,gives 1 not prime
c.24 not divisible by 7
d.28 => 4x7/2x7 gives 2 => p1 & p2 =2 ,condition holds . correct answer
e.35 p1=5 ,gives 1 (not prime)
n has to be of the form p1*7*p2.
(n/p1*7) would result in p2 . since p1 and 7 cannot be further broken down
a.7 p1=1 ,gives result 1=(not prime) false
b.14 p1=2 ,gives 1 not prime
c.24 not divisible by 7
d.28 => 4x7/2x7 gives 2 => p1 & p2 =2 ,condition holds . correct answer
e.35 p1=5 ,gives 1 (not prime)





