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NECO SSCE Mathematics 2015 past questions and answers

This 2015 NECO SSCE Mathematics set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2015 set with instant marking.

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Sample NECO SSCE Mathematics 2015 questions

1. The values 1, 2 and 3 occur with frequencies 2, 3 and 1 respectively. What is the mean?
  1. 2
  2. 11/6
  3. 5/3
  4. 7/3

Answer: B. 11/6

The weighted total is 1(2) + 2(3) + 3(1) = 11 and the total frequency is 6, so the mean is 11/6.

2. Two fair six-sided dice are thrown together; what is the probability that their scores sum to 9?
  1. 1/6
  2. 1/12
  3. 5/36
  4. 1/9

Answer: D. 1/9

The four ordered outcomes (3,6), (4,5), (5,4) and (6,3) out of 36 give probability 4/36 = 1/9.

3. Find the determinant of the matrix with rows (3, 2) and (5, 4).
  1. 2
  2. 22
  3. -2
  4. 12

Answer: A. 2

The determinant is (3)(4) - (2)(5) = 2.

4. What is the magnitude of the vector (6, -8)?
  1. 2
  2. 8
  3. 10
  4. 14

Answer: C. 10

The magnitude is sqrt(6^2 + (-8)^2) = sqrt(100) = 10.

5. Point P(2, -3) is reflected in the x-axis; what are the coordinates of its image?
  1. (-2, -3)
  2. (2, 3)
  3. (-2, 3)
  4. (3, 2)

Answer: B. (2, 3)

Reflection in the x-axis keeps the x-coordinate and changes the sign of the y-coordinate, giving (2, 3).

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