# Mathematics 2019 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. Evaluate and correct to two decimal places, 75.0785 – 34.624 + 9.83
• A. 30.60
• B. 50.29
• C. 50.28
• D. 30.62

2. If x = {x : x < 7} and Y = {y : y is a factor of 24} are subsets of μ= {1, 2, 3…10} find X ∩ Y

• A. {2, 3, 4, 6}
• B. {1, 2, 3, 4, 6}
• C. {2, 3, 4, 6, 8}
• D. {1, 2, 3, 4, 6, 8}

3.  Simplify  [($$\frac{16}{9}$$)$$^{\frac{-3}{2}}$$ x 16$$^{\frac{-3}{2}}$$]$$^{\frac{1}{3}}$$

• A. $$\frac{3}{4}$$
• B. $$\frac{9}{16}$$
• C. $$\frac{3}{8}$$
• D. $$\frac{1}{4}$$
4.
Express 1 + 2 log10$$^3$$ in the form log10$$^9$$
• A. log10$$^{90}$$
• B. log10$$^{19}$$
• C. log10$$^{9}$$
• D. log10$$^{6}$$

5.  If 101two+ 12y = 3.3five. Find the value of y

• A. 8
• B. 7
• C. 6
• D. 5

6.   An amount of N550,000.00 was realized when a principal, x was saved at 2% simple interest for 5 years. Find the value of x

• A. N470,000.00
• B. N480,000.00
• C. N490,000.00
• D. N500,000.00

7.  Given that $$\frac{\sqrt{3} + \sqrt{5}}{\sqrt{5}}$$

= x + y$$\sqrt{15}$$, find the value of (x + y)

• A. 1$$\frac{3}{5}$$
• B. 1$$\frac{2}{5}$$
• C. 1$$\frac{1}{5}$$
• D. $$\frac{1}{5}$$

8.  If x = 3 and y = -1, evaluate 2(x$$^2$$ – y$$^3$$)

• A. 24
• B. 22
• C. 20
• D. 16

9.  Solve 3x – 2y = 10 and x + 3y = 7 simultaneously

• A. x = -4 and y = 1
• B. x = -1 and y = -4
• C. x = 1 and y = 4
• D. x = 4 and y = 1

10. The implication x →y is equivalent to

• A. ~ y → ~ x
• B. y → ~ x
• C. ~ x → ~ y
• D. y → x

11.  The first term of a geometric progression (G.P) is 3 and the 5th term is 48. Find the common ratio.

• A. 2
• B. 4
• C. 8
• D. 16

12.   Solve $$\frac{1}{3}$$(5 – 3x) < $$\frac{2}{5}$$(3 – x)

• A. x > $$\frac{7}{22}$$
• B. x < $$\frac{7}{22}$$
• C. x > $$\frac{-7}{27}$$
• D. x < $$\frac{-7}{27}$$

13.   Make m the subject of the relation k = $$\frac{m – y}{m + 1}$$

• A.
m = $$\frac{y + k^2}{k^2 + 1}$$
• B.
m = $$\frac{y + k^2}{1 – k^2}$$
• C.
m = $$\frac{y – k^2}{k^2 + 1}$$
• D.
m = $$\frac{y – k^2}{1 – k^2}$$

14.  Find the quadratic equation whose roots are $$\frac{1}{2}$$  and -$$\frac{1}{3}$$

• A. 3x$$^2$$ + x + 1 = 0
• B. 6x$$^2$$ + x – 1 = 0
• C. 3x$$^2$$ + x – 1 = 0
• D. 6x$$^2$$ – x – 1 = 0

15.   Given that x is directly proportional to y and inversely proportional to Z, x = 15 when y = 10 and Z = 4, find the equation connecting x, y and z

• A. x = $$\frac{6y}{z}$$
• B. x = $$\frac{12y}{z}$$
• C. x = $$\frac{3y}{z}$$
• D. x = $$\frac{3y}{2z}$$

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