1. In the sequence below, how many odd numbers are immediately preceded by 7 as
well as immediately followed by 5? Sequence: 728195735729485

2. How many numbers from 1 to 100 are there, each of which is not only exactly
divisible by 8 but also has 8 as a digit in it?

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

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

5. 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 15 pupils of the row?

6. In a queue of 18 persons buying tickets from a counter, if every third 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?

7. How many 7s are there in the following number sequence that are immediately
preceded by 3 but not immediately followed by 8? Sequence: 3 7 4 2 3 7 1 5 3 7 6 3 7
9

8. Which of the following will be the middle digits of the middle number after reversing
the digits of the following numbers: 123, 456, 789, 234, 567?

9. A number is greater than 35 but less than 40. Also, it is greater than 37 but less than
39. Then the number is:

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