1. Which one of the following in not a prime number?

a. 18

b. 45

**c. 49**

d. 25

2. What is the next number of the series? 9, 16, 25, 36 ......?....

**a. 49**

b. 59

c. 15

d. 00

3. Ten years ago, Muthu was half of Ravi in age. If the ratio of their present ages is 3:4. what will be the total of their present Ages?

a. 55

b. 45

c. 25

**d. 35**

4. The dimensions of cinema theater are 100 m, 50 m and 18 m. How many persons can sit in the hall, if each requires 150 cub. m. of air?

a. 100

**b. 600**

c. 50

d. 897

5. If 10 men can do a job in 15 days, then how many day shall take 3 men to do the job?

**a. 50 days**

b. 60 days

c. 70 days

d. 80 days

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