Jamb Mathematics Past Questions For Year 1979
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
A group of market women sell at least one of yam, plantain, and maize. 12 of them sell maize, 10 sell yam, and 14 sell plantain. 5 sell plantain and maize, 4 sell yam and maize, 2 sell yam and plantain only while 3 sell all the three items. How many women are in the group?
- A. 25
- B. 19
- C. 18
- D. 17
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 10-5
- B. 2 x 10-1
- C. 2 x 101
- D. 2 x 10-4
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. 5544m2
- B. 1386m2
- C. 132m2
- D. 264m2
- E. 693m2
