1. In a queue of 10 persons buying tickets from a counter, if every third person from the
counter is male and the person at the beginning and at the end of the queue is also
male, how many persons in the queue are female?

2. How many numbers from 20 to 80 are divisible by 8?

3. How many 4s are there in the following number sequence that are immediately
preceded by 7 but not immediately followed by 2?

Sequence: 7 4 1 9 7 4 5 7 4 8 7 4 3
7 4 0

4. In a row of 40 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 first half of the row?

5. In the sequence below, how many odd numbers are immediately preceded by 5 as
well as immediately followed by 8? Sequence: 581758948658175

6. How many numbers from 1 to 100 are there, each of which is not only exactly
divisible by 5 but also has 5 as a digit in it?

7. How many numbers from 10 to 40 are divisible by 9 but not by 3?

8. A number is greater than 30 but less than 40. Also, it is greater than 32 but less than
36. Then the number is:

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

10. Which of the following will be the middle digits of the middle number after reversing
the digits of the following numbers: 594, 832, 741, 268, 495?