Jamb Mathematics Past 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
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
Make q the subject of the formula in the equation \(\frac{mn}{a^2} - \frac{pq}{b^2} = 1\)
- A. \(q = \frac{b^2(mn - a^2)}{a^2p}\)
- B. \(q = \frac{m^2 n - a^2}{p^2}\)
- C. \(q = \frac{mn - 2b^2}{a^2}\)
- D. \(q = \frac{b^2(n^2 - ma^2)}{n}\)
Question 14
The angle of elevation of the top of a tree from a point on the ground 60m away from the foot of the tree is 78°. Find the height of the tree correct to the nearest whole number.
- A. 148m
- B. 382m
- C. 282m
- D. 248m
Question 15
A binary operation \(\otimes\) is defined by \(m \otimes n = mn + m - n\) on the set of real numbers, for all m, n \(\in\) R. Find the value of 3 \(\otimes\) (2 \(\otimes\) 4).
- A. 6
- B. 25
- C. 15
- D. 18
