Neco Mathematics 2008 Past Questions and Answers

Question 26:

• NECO 2008

Find the mean deviation of 20, 25, 21, 27, 28, 29, to the nearest whole number

A. 2
B. 3
C. 4
D. 5
E. 6

Question 27:

• NECO 2008

Calculate the area of a parallelogram whose diagonals are of length 8cm and 12cm and intersect at an angle of 135°

A. 271.5cm²
B. 135.8cm²
C. 96.0cm²
D. 48.0cm²
E. 33.9cm²

Question 28:

• NECO 2008

The ratio of the base area of a hollow cone to that of its curved surface is 1:4. If its base radius is 7cm, calculate the slant height of the cone

A. 7cm
B. 22cm
C. 28cm
D. 49cm
E. 154cm

Question 29:

• NECO 2008

Increase 135 in the ratio 3:5

A. 225
B. 216
C. 143
D. 140
E. 140

Question 30:

• NECO 2008

Given that x² + y² + k = 60 and x = \(\sqrt{10}\) when y = , find the value of k.

A. 56
B. 34
C. 32
D. -34
E. -56