Mathematics 1993 Waec Past Questions and Answers

Question 6 :

• WAEC 1993

A stick of length 1.75m was measured by a boy as 1.80m. Find the percentage error in his measurement

A. 2⁷/₉%
B. 2⁶/₇%
C. 5%
D. 27⁷/₉%
E. 28⁴/₇%.

Question 7 :

• WAEC 1993

The nth term of a sequence is given by (-1)\(^{n-2}\) x 2\(^{n+1}\). Find the sum of the second and third terms.

A. -2
B. 1
C. 2
D. 6
E. 12

Question 8 :

• WAEC 1993

Simplify: \(\frac{4^{-\frac{1}{2}} \times 16^{\frac{3}{4}}}{4^{\frac{1}{2}}}\)

A. ¹/₄
C. 1
D. 2
E. 4

Question 9 :

• WAEC 1993

Simplify: \(\frac{\log \sqrt{27}}{\log \sqrt{81}}\)

A. 1/6
B. 3/8
C. 1/2
D. 3/4
E. 6

Question 10 :

• WAEC 1993

Factorize the expression 2s\(^2\) - 3st - 2t\(^2\).

A. (2s - t)(s + 2t)
B. (2s + t)(s - 2t)
C. (s + t)(2s - 1)
D. (2s + t)(s -t)
E. (2s + t)(s + 2t)