Let 'a', 'b', 'c' and 'd' be the prime number in ascending order. The product of the first three is 7429 and last three is 12673. Find the first number. Given that a×b×c=7429 and b×c×d=12673 Therefore,
b×c×d
a×b×c
=
12673
7429
⇒
d
a
=
29
17
Since a and d are prime number there won't be any common factor which can divide both. Hence, a=17,b=19,c=23 and d=29 Therefore, option B is the correct answer.