Jamb 1980 Mathematics Questions
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 which moves so that angle PXQ = 45o. 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 Log10<sup style='font-size: smaller;'>2</sup>
- B Log10<sup style='font-size: smaller;'>4</sup>
- 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 + \(\frac{5v - 1}{a}\)]