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Mathematics Past Questions

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11
If \(m*n = (\frac{m}{n} - \frac{n}{m}\)) for m, n belong to R, evaluate -3*4
  • A. \(\frac{-25}{12}\)
  • B. \(\frac{-7}{12}\)
  • C. \(\frac{7}{12}\)
  • D. \(\frac{25}{12}\)
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12
The sum of two numbers is twice their difference. If the difference of the numbers is P, find the larger of the two numbers
  • A. p/2
  • B. 3p/2
  • C. 5p/2
  • D. 3p
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13

A binary operation * is defined by a*b = ab+a+b for any real number a and b. if the identity element is zero, find the inverse of 2 under this operation.

  • A. 2/3
  • B. 1/2
  • C. -1/2
  • D. -2/3
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14
Factorize completely X2+2XY+Y2+3X+3Y-18
  • A. (x+y+6)(x+y-3)
  • B. (x-y-6)(x-y+3)
  • C. (x-y+6)(x-y-3)
  • D. (x+y-6)(x+y+3)
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15
Tope bought X oranges at N5.00 each and some mangoes at N4.00 each. if she bought twice as many mangoes as oranges and spent at least N65.00 and at most N130.00, find the range of values of X.
  • A. 4≤X≤5
  • B. 5≤X≤8
  • C. 5≤X≤10
  • D. 8≤X≤10
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