Jamb Mathematics Past Questions For Year 1980
Question 11
The ratio of the areas of similar triangles is necessarily equal to
- A. the ratio of the corresponding sides
- B. the ratio of the squares of corresponding sides
- C. the ratio of the corresponding heights of the triangles
- D. half the ratio of the corresponding heights of the triangles
- E. the ratio of the corresponding bases to the heights of the triangles
Question 12
P and Q are fixed points and X is a variable point that moves so that angle PXQ = 45°. What is the locus of x?
- A. A pair of straight lines parallel to PQ
- B. The perpendicular bisector of PQ
- C. An arc of a circle passing through P and Q
- D. A circle with diameter PQ
- E. The bisector of angle PXQ
Question 13
A man and his wife went to buy an article costing N400. The woman had 10% of the cost and the man 40% of the remainder. How much did they have altogether?
- A. N216
- B. N200
- C. N184
- D. N144
- E. N100
Question 14
Simplify \(\frac{log_{10}8}{log_{10}4}\)
- A. log102
- B. log104
- C. \(\frac{3}{2}\)
- D. 2
- E. None of the above
Question 15
Make c the subject of formula v = 1 - \(\frac{a}{5}\)(b + \(\frac{3c}{7}\))
- A. [\(\frac{7}{3}\) + \(\frac{5}{a}\)(v - 1)] + b
- B. [\(\frac{7b}{3}\) + \(\frac{5}{a}\)(v - 1)]
- C. \(\frac{7}{3}\)[b + \(\frac{5}{a}\)(v - 1)]
- D. \(\frac{7}{3}\)[b + \(\frac{5v - 1}{a}\)]
