# Mathematics 2018 Past Questions | WAEC

Study the following Mathematics past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

1.  Simplify: $$\sqrt{108} + \sqrt{125} – \sqrt{75}$$
• A. $$\sqrt{3} + 5\sqrt{5}$$
• B. $$6 \sqrt{3} – 5 \sqrt{5}$$
• C.$$6 \sqrt{3} + \sqrt{2}$$
• D. $$6\sqrt{3} – \sqrt{2}$$

2.  Evaluate: $$(64^{\frac{1}{2}} + 125^{\frac{1}{3}})^2$$

• A. 121
• B. 144
• C. 169
• D. 196

3.  Given that y varies inversely as the square of x. If x = 3 when y = 100, find the equation connecting x and y.

• A.$$yx^2 = 300$$
• B.$$yx^2 = 900$$
• C.y = $$\frac{100x}{9}$$
• D.$$y = 900x^2$$

4.  Find the value of x for which $$32_{four} = 22_x$$

• A. three
• B. five
• C. six
• D. seven

5.  Simplify; 2$$\frac{1}{4} \times 3\frac{1}{2} \div 4 \frac{3}{8}$$

• A. $$\frac{5}{9}$$
• B. 1$$\frac{1}{5}$$
• C. 1$$\frac{1}{4}$$
• D. 1$$\frac{4}{5}$$

6. There are 250 boys and 150 girls in a school, if 60% of the boys and 40% of the girls play football, what percentage of the school play football?

• A. 40.0%
• B. 42.2%
• C. 50.0%
• D. 52.5%

7.  If $$\log_{10}$$(6x – 4) – $$\log_{10}$$2 = 1, solve for x.

• A. 2
• B. 3
• C. 4
• D. 5

8.  If F = $$\frac{9}{5}$$C + 32, find C when F = 98.6

A. 30
B. 37
C. 39
D. 41

9. If y + 2x = 4 and y – 3x = -1, find the value of (x + y)

• A. 3
• B. 2
• C. 1
• D. -1

10.  If x : y : z = 3 : 3 : 4, evaluate $$\frac{9x + 3y}{6x – 2y}$$

• A.1$$\frac{1}{2}$$
• B.2
• C. 2$$\frac{1}{2}$$
• D. 3
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