When 0.04 is written as a fraction in its simplest form, then the sum of numerator and denominator is

1. 7

2. 21

3. 26

4. 104

13.572 correct to the tenth place is

1. 10

2. 13.57

3. 14.5

4. 13.6

2 km 7 m is equal to

1. 2.7 km

2. 2.07 km

3. 2.007 km

4. 2.0007 km

Among 2.34, 2.43, 2.344 and 2.4, the greatest number is

1. 2.34

2. 2.43

3. 2.344

4. 2.4