Question

There are four prime numbers written in
ascending order. The product of the first
three is 1001 and that of the last three is
2431. The last number is :
options:
(1) 17
(2)19
(3)23
(4)13​

Answer 1

Answer:

Let the numbers be a, b, c, d Then abc=385 and bcd=1001

⇒

bcd

abc

=

1001

385

=

d

a

=

13

5

⇒a=5,d=13

Answer 2

Answer:

17 as 17*13*11=2431

hope you understand