Mathematics 2007 Waec Past Questions and Answers

Question 21 :

• WAEC 2007

Simplify(0.3 x 10⁵) \(\div\) (0.4 \(\times\) 10⁷), leaving you answer in the standard form.

A. 7.5 x 10^-4
B. 7.5 x 10^-3
C. 7.5 x 10^-2
D. 7.5 x 10^-1

Question 22 :

• WAEC 2007

If p \(\alpha \frac{I}{Q}\) which of the following is true?

A. Q \(\alpha p^2\)
B. Q \(\alpha \frac{1}{p^2}\)
C. Q \(\alpha \sqrt{p}\)
D. Q \(\alpha \frac{1}{p}\)

Question 23 :

• WAEC 2007

Simplify 3\(\sqrt{45} - 12\sqrt{5} + 16\sqrt{20}\), leaving your answer in surd form.

A. 29\(\sqrt{5}\)
B. 14\(\sqrt{15}\)
C. 12\(\sqrt{15}\)
D. 11\(\sqrt{15}\)

Question 24 :

• WAEC 2007

Which of the following statement is true for the ste P = {-3.2 \(\leq\) x < 5} where x is an integer?

A. Least value of x is -3.2
B. Least value of x is -3
C. Greatest value of x is 4.9
D. Greatest value of x is 5

Question 25 :

• WAEC 2007

Simplify \(\frac{3x^3}{(3x)^3}\)

A. 1
B. \(\frac{1}{3}\)
C. \(\frac{1}{9}\)
D. \(\frac{1}{27}\)