Mathematics 2020 Past Questions | WAEC
Study the following Mathematics past questions and answers for JAMB, WAEC NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.
- 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. \(\frac{1}{4}\)
- 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 = \(\frac{3y}{2z}\)
