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Mathematics JAMB Past Questions

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1316
A side of a rhombus is 2cm in length. An angle of the rhombus is 60o. What is the length of the diagonal facing this angle?
  • A. 2cm
  • B. 8cm
  • C. 4cm
  • D. 2\(\sqrt{3}\)cm
  • E. 16cm
View Answer & Discuss (4) JAMB 1982
1317

A variable y is inversely proportional to x\(^2\), when y = 10, x = 2. What is y when x = 10?

  • A. 2
  • B. 4
  • C. 100
  • D. 0.4
  • E. 0.1
View Answer & Discuss (4) JAMB 1982
1318
Two distinct sectors i the same circle substend 100o and 30o respectively at the centre of the circle. Their corresponding arcs are in ratio
  • A. 10:3
  • B. 1:100
  • C. 3:1
  • D. 5:2
View Answer & Discuss (2) JAMB 1982
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1319
The arithmetic mean of the ages of 30 pupils in a class is 15.3 years. One boy leaves the class and one girl is enrolled, and the new average age of 30 pupils in the class becomes 15.2 years. How much older is the boy than the girl?
  • A. 30 years
  • B. 6 years
  • C. 9 years
  • D. 3 years
  • E. 1 year
View Answer & Discuss (1) JAMB 1982
1320

Suppose x varies inversely as y, y varies directly as the square of t and x = 1, when t = 3. Find x when t = \(\frac{1}{3}\).

  • A. 81
  • B. 27
  • C. \(\frac{1}{9}\)
  • D. \(\frac{1}{27}\)
  • E. \(\frac{1}{81}\)
View Answer & Discuss JAMB 1981
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