Question 1:

• JAMB 1979

The mean of the numbers 1.2, 1.0, 0.9, 1.4, 0.8, 0.8, 1.2 and 1.1 is

A. 1.5
B. 0.8
C. 1.0
D. 1.02
E. 1.05

Question 2:

• JAMB 1979

\((1.28 \times 10^{4}) \div (6.4 \times 10^{2})\) equals

A. 2 x 10^-5
B. 2 x 10^-1
C. 2 x 10¹
D. 2 x 10^-4

Question 3:

• JAMB 1979

If the value of \(\pi\) is taken to be \(\frac{22}{7}\), the area of a semi-circle of diameter 42m is

A. 5544m²
B. 1386m²
C. 132m²
D. 264m²
E. 693m²

Question 4:

• JAMB 1979

(3.2)² - (1.8)² equals

A. 7.0
B. 2.56
C. 13.48
D. 2.0
E. 0.07

Question 5:

• JAMB 1979

In \(\bigtriangleup\)PQR, PQ = 10cm, QR = 8cm and RP = 6cm, the perpendicular RS is drawn from R to PQ. Find the length of RS

A. 4cm
B. 32cm
C. \(\frac{30}{7}\)
D. \(\frac{40}{7}\)
E. 4.8cm