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Mathematics 1980 JAMB Past Questions

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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
View Answer & Discuss (4) JAMB 1980
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
View Answer & Discuss (3) JAMB 1980
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
View Answer & Discuss (3) JAMB 1980
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14
Simplify \(\frac{log_{10}8}{log_{10}4}\)
  • A. log102
  • B. log104
  • C. \(\frac{3}{2}\)
  • D. 2
  • E. None of the above
View Answer & Discuss (1) JAMB 1980
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 + \(\frac{5v - 1}{a}\)]
View Answer & Discuss (8) JAMB 1980
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