They are: 2^3 times 7^2 = 392
7 x 53 = 371
3 x 7 x 3
3 x 7 x 7 = 147
2)490 5)245 7)49 7)7 = 1 When reduced to '1' Then the four numbers are 2,5,7,7. All prime numbers.
They are: 2*5*7*7 = 490
2 x 3 x 7 x 7
3 x 7 x 7
They are: 2^3 times 7^2 = 392
7 x 53 = 371
5 x 5 x 7
3 x 7 x 3
3 x 7 x 7 = 147
2)490 5)245 7)49 7)7 = 1 When reduced to '1' Then the four numbers are 2,5,7,7. All prime numbers.
3 x 5 x 7 x 7
They are: 2*2*2*2*7 = 112
3 x 7 x 11 = 231