Neco Mathematics Past Questions and Answers

Question 51:

• NECO 2002

If , sT = \(\sqrt{\frac{[(a + T)T]}{a}}\) what does T equal?

A. T = (a²s² – 1)
B. T = (a²s²– 1) ÷ a
C. T = a ÷ (a² - s²)
D. T = a ÷ (a²s² – 1)
E. T = (as – 1)²

Question 52:

• NECO 2002

What is the total surface area of a cuboid whose dimensions are 12cm × 8cm × 3cm?

A. 312cm\(^2\)
B. 96cm\(^2\)
C. 36cm\(^2\)
D. 24cm\(^2\)
E. 12cm\(^2\)

Question 53:

• NECO 2002

If sin 30° = 0.5, what is the cosine of its complement?

A. -0.866
B. -0.5
C. 0.0.5
D. 0.866
E. 1

Question 54:

• NECO 2002

A petrol attendant recorded the number of vehicles that bought petrol from him for -3 hours and recorded 12 cars and 27 buses. What is the probability that the next vehicle will be a bus?

A. \(\frac{4}{39}\)
B. \(\frac{4}{13}\)
C. \(\frac{5}{13}\)
D. \(\frac{6}{13}\)
E. \(\frac{9}{13}\)

Question 55:

• NECO 2002

Two parallel chords of a circle are respectively 46cm and 40cm long. If the radius of the circle is 25cm and the centre of the circle lies between the two chords, what is the distance between the chords?

A. 7cm
B. 15cm
C. 22cm
D. 26cm
E. 30cm