Jamb 1979 Mathematics Questions
Question 11:
A trader goes to Ghana for y days with y cedis. For the first x days, he spends X cedis per day. The amount he has to spend per day for the rest of his stay is
- A \(\frac{y(y - x)}{y - x}\) cedis
- B \(\frac{Yy - Xx)}{y - x}\) cedis
- C \(\frac{Y - Xy)}{y - x}\) cedis
- D \(\frac{Y - X}{y - x}\) cedis
- E \(\frac{Y - Xx}{y - x}\) cedis
Question 12:
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 13:
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 14:
\((1.28 \times 10^{4}) \div (6.4 \times 10^{2})\) equals
- A 2 x 10<sup style='font-size: smaller;'>-5</sup>
- B 2 x 10<sup style='font-size: smaller;'>-1</sup>
- C 2 x 10<sup style='font-size: smaller;'>1</sup>
- D 2 x 10<sup style='font-size: smaller;'>-4</sup>
Question 15:
If the value of \(\pi\) is taken to be \(\frac{22}{7}\), the area of a semi-circle of diameter 42m is
- A 5544m<sup style='font-size: smaller;'>2</sup>
- B 1386m<sup style='font-size: smaller;'>2</sup>
- C 132m<sup style='font-size: smaller;'>2</sup>
- D 264m<sup style='font-size: smaller;'>2</sup>
- E 693m<sup style='font-size: smaller;'>2</sup>