CAT4 Quantitative Reasoning 5

Question 1

What number continues: 1, 3, 7, 15, 31, ?

Accepted Answer

63

Answer

Each term doubles and adds 1, so 31 x 2 + 1 = 63.

Question 2

If 5 workers build a wall in 10 days, how long for 10 workers at the same rate?

Accepted Answer

5 days

Answer

Doubling the workers halves the time, so 10 / 2 = 5 days.

Question 3

What is the missing number: 81, 27, 9, 3, ?

Accepted Answer

1

Answer

Each term is divided by 3, so 3 / 3 = 1.

Question 4

A class has 30 students and 60% are girls. How many girls are there?

Accepted Answer

18

Answer

60% of 30 is 0.6 x 30 = 18.

Question 5

What number comes next: 11, 22, 33, 44, ?

Accepted Answer

55

Answer

Each term increases by 11, so 44 + 11 = 55.

CAT4 Practice Test