The sum of the prime factors of 1729 is

1. 13

2. 19

3. 32

4. 39

Which of the following is a pair of co-prime numbers?

1. 8, 45

2. 3, 18

3. 5, 35

4. 6, 39

Which of the following numbers is divisible by 4?

1. 308594

2. 506784

3. 732106

4. 9301538

Which of the following numbers is divisible by 8?

1. 503786

2. 505268

3. 305678

4. 703568