Neco Mathematics 2005 Past Questions and Answers

Question 21:

• NECO 2005

Evaluate log 18 + log⁶ - log16\(^{\frac{1}{2}}\)

A. Log 3
B. Log 9
C. Log 20
D. 3 log 2
E. 3 log 3

Question 22:

• NECO 2005

A bag contains 4 blue and 8 red identical balls. If two balls are picked at random with replacement, what is the probability of picking two balls of different colours?

A. 1
B. \(\frac{13}{26}\)
C. \(\frac{5}{18}\)
D. \(\frac{4}{9}\)
E. \(\frac{2}{9}\)

Question 23:

• NECO 2005

A car dealer sells a car and makes a profit of 15%. If the car costs N320,000.00, how much did he sell the car?

A. N272,000.00
B. N296,000.00
C. N300,000.00
D. N368,000.00
E. N400,000.00

Question 24:

• NECO 2005

If A(I,2,3,...,10) ; B = (-5,-4,.....,-1) ; C = (-1, 0, 1, 2,....5) List all the elements in (B ∪ C) ∩ A

A. (-1,2,...5)
B. (-1,1,....5)
C. (1,2,..5)
D. (2,3,...10)
E. (1,2,...10)

Question 25:

• NECO 2005

What is the positive difference between the squares of 2.5 and 2.1 to 1 significant figures?

A. – 2.0
B. – 184
C. -1.84
D. 2
E. 18.4