1. In a queue of 16 persons buying tickets from a counter, if every fourth person from
the counter is female and the person at the beginning and at the end of the queue is
also female, how many persons in the queue are male?

2. A number is greater than 15 but less than 25. Also, it is greater than 18 but less than
22. Then the number is:

3. Which one of the following pairs is different from the other four?

4. How many 5s are there in the following number sequence that are immediately
preceded by 2 but not immediately followed by 6? Sequence: 2 5 7 8 2 5 4 2 5 1 2 5 3

5. Which of the following will be the middle digits of the middle number after reversing
the digits of the following numbers: 543, 678, 234, 789, 912?

6. How many numbers from 30 to 60 are divisible by 7 but not by 14?

7. In a row of 50 pupils, the first boy is followed by one girl, the second boy is followed
by two girls, the third boy is followed by three girls, and so on. What is the number of
girls in the last 20 pupils of the row?

8. How many numbers from 15 to 75 are divisible by 9?

9. In the sequence below, how many odd numbers are immediately preceded by 5 as
well as immediately followed by 2? Sequence: 572395727185

10. How many numbers from 1 to 100 are there, each of which is not only exactly
divisible by 9 but also has 9 as a digit in it?