- In a test, for each correct answer, 1 mark is awarded and one mark is deducted for each wrong answer. When a boy answers all 20 items of the test and gets 8 marks, the number of questions answered correctly by him was

- 14
- 8
- 16
- 12

### Answer is a

2. The sum of the digits of a two-digit number is 10. If the number that is formed by reversing its digits is 18 less than the original number. Find the original number.

- 16
- 60
- 64
- 81

### Answer is c

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3. A man ate 100 grapes in 5 days. Each day, if he ate 6 more grapes than those he ate on the earlier day. Find how many grapes did he eat on the first day?

- 12
- 76
- 8
- 54

### Answer is c

4. What decimal of a week is an hour?

- 0.0062
- 0.059
- 0.062
- 0.0059

### Answer is d

5. If the sum of a 2-digit number and therefore the number obtained by reversing its digits may be a square number. Find how many such numbers are there?

- 6
- 8
- 5
- 7

### Answer is **b**

Read More: Number System Concepts