The sum of the digits of a two digit number is 9 and the product of the digits is 20. If the unit digit is greater than the tens digit. The number is

1. 45

2. 54

3. none of these

Two whole numbers are in ratio 3:2. If the sum of their square is 52, the numbers are:

1. 9 and 6

2. 6 and 4

3. 9 and 4

4. none of these

Three positive numbers are in ratio 4 : 3 : 2. If the difference between square of the largest and the smallest number is 48, the numbers are;

1. 48, 36 and 24

2. 24, 18 and 12

3. 8, 6 and 2

4. 8, 6 and 4