Question

Find the prime number of 465 822 600 743

Answer 1

The prime number is 743

456 is divisible by 5

822 is divisible by 2

600 is divisible by 10

743 is only divisible by itself and 1 making it prime

Answer 2

465 ends in 5, so it must be divisible by  5.
822 and  600 are even, so the y are divisible by 2.
All that is left is 743, so that has to be it.