Waec Mathematics Past Questions and Answers

Question 726:

• WAEC 2001

Which of the following correctly expresses 48 as a product of prime factors?

A. 3 x 4 x 4
B. 2 x 3 x 8
C. 2 x 2 x 2 x 3 x 4
D. 2 x 2 x 2 x 2 x 3

Question 727:

• WAEC 2001

Which of the following correctly expresses 48 as a product of prime factors?

A. 3 x 4 x 4
B. 2 x 3 x 8
C. 2 x 2 x 2 x 3 x 4
D. 2 x 2 x 2 x 2 x 3

Question 728:

• WAEC 2001

Evaluate \((20_{three})^2 - (11_{three})^2\) in base three

A. 101
B. 121
C. 202
D. 2020

Question 729:

• WAEC 2001

Evaluate \(log_{10}5 + log_{10}20\)

A. 2
B. 3
C. 4
D. 5

Question 730:

• WAEC 2001

In a class of 80 students, every students studies Economics or Geography or both. If 65 students study Economics and 50 study Geography, how many study both subjects?

A. 15
B. 30
C. 35
D. 45