4,9,20,43,90??

143

180

185

none

1,2,8,144, ?

41472

288

8

17, 25, 32, 37, 47, 58, 71, ?

79

90

97

75

1,2,3,5,8,13,21,?

44

22

34

28

8 9 8 6 8 4 8 3 8?

5

9

3

How many prime numbers are there up to 50?

13

15

17

21

Which of the following is a composite number?

37

47

57

67

How many pairs of prime numbers are there to express 18 as the sum of two prime numbers?

1

2

4

Bill is 4 years older than Jill and 2 years younger than David. If Jill is 12, then what is the percent of years she is older than David?

18 to 12

9 to 6

17 to 15

None of the above

Bob just got his driver's license and now he has to drive his brothers and sisters to and from school. If the ratio of brothers to sisters is 4 to 1 and he has 3 sisters, then how many brothers does Bob have?

6

10

12