Waec Mathematics Past Questions and Answers

Question 671:

• WAEC 2000

Simplify \(\left(\frac{16}{81}\right)^{-\frac{3}{4}}\times \sqrt{\frac{100}{81}}\)

A. \(\frac{80}{243}\)
B. \(\frac{1}{64}\)
C. \(\frac{25}{6}\)
D. \(\frac{15}{4}\)

Question 672:

• WAEC 2000

Which of the following numbers is perfect cube?

A. 350
B. 504
C. 950
D. 1728

Question 673:

• WAEC 2000

If \(104_x = 68\), find the value of x

A. 5
B. 7
C. 8
D. 9

Question 674:

• WAEC 2000

The ages of three men are in the ratio 3:4:5. If the difference between the ages of the oldest and youngest is 18 years, find the sum of the ages of the three men

A. 45 years
B. 72 years
C. 108 years
D. 216 years

Question 675:

• WAEC 2000

Given that \(log_4 x = -3\), find x.

A. \(\frac{1}{81}\)
B. \(\frac{1}{64}\)
C. 64
D. 81