The difference between the largest number of 3-digits and the smallest number of 3-digits formed by the digits 3, 0 and 8 is

1. 495

2. 765

3. 522

4. 450

How many 7 digit numbers are there in all?

1. 90,00,000

2. 90,00,001

3. 89,99,999

4. 10,00,000

The largest number of 4 digits which is exactly divisible by 25 is

1. 1,000

2. 10,000

3. 9,950

4. 9,975

The number which when divided by 23 gives 17 as quotient and 19 as remainder, is

1. 413

2. 412

3. 411

4. none of these