Waec 2021 Mathematics Past Questions And Answers
In the diagram O is the centre of the circle PQRS, ∠PQR = 72° and OR is parallel to PS. Find ∠OPS
- A. 18°
- B. 108°
- C. 54°
- D. 36°
In the diagram, line \(\overline{EC}\) is a diameter of the circle ABCDE.
If angle ABC equals 158°, find ∠ADE
- A. 112°
- B. 90°
- C. 68°
- D. 22°
π =\(\frac{22}{7}\)
- A. 84cm2
- B. 80cm2
- C. 30cm2
- D. 94cm2
A fair die is tossed 60 times and the results are recorded in the table
| Number of die | 1 | 2 | 3 | 4 | 5 | 6 |
| Frequency | 15 | 10 | 14 | 2 | 8 | 11 |
Find the probability of obtaining a prime number.
- A. \(\frac{7}{30}\)
- B. \(\frac{1}{6}\)
- C. \(\frac{7}{15}\)
- D. \(\frac{8}{15}\)
find the first quartile of 7,8,7,9,11,8,7,9,6 and 8.
- A. 8.5
- B. 7.0
- C. 7.5
- D. 8.0
if p = {-3 < x < 1} and Q = {-1 < x < 3}, where x is a real number, find P n Q.
- A. 0
- B. -3, -2, -1, 0 and 1
- C. -2, -1 and 0
- D. -1, 0 and 1
Find, correct to two decimal, the mean of 1\(\frac{1}{2}\), 2\(\frac{2}{3}\), 3\(\frac{3}{4}\), 4\(\frac{4}{5}\), and 5\(\frac{5}{6}\).
- A. 3.71
- B. 3.70
- C. 3.69
- D. 3.72
If ( 1- 2x)\(^4\) = 1 + px + qx\(^2\) - 32x\(^3\) + 16\(^4\), find the value of (q - p)
- A. -32
- B. -16
- C. 16
- D. 32
A committee consists of 6 boys and 4 girls. In how many ways can a sub-committee consisting of 3 boys and 2 girls be formed if one particular boy and one particular girl must be on the sub-committee?
- A. 120
- B. 80
- C. 56
- D. 30
A bag contains 24 mangoes out of which six are bad. If 6 mangoes are selected randomly from the bag with replacement, find the probability that not more than 3 are bad.
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