Mathematics Exam Past Questions and Answers | JAMB, WAEC and NECO

Mathematics looks at measurement, relationships, and properties of numbers and groups using numbers and symbols. Important topics in math include arithmetic, algebra, geometry, and calculus.

• Question 1461: If x varies directly as square root of y and x = 81 when y = 9, Find x when y = 1$\frac{7}{9}$ Options:
  A) 20$\frac{1}{4}$
  B) 27
  C) 2$\frac{1}{4}$
  D) 36
  Show Answer
  The correct answer is D .
• Question 1462: Find the standard deviation of 5, 4, 3, 2, 1 Options:
  A) $\sqrt{2}$
  B) $\sqrt{3}$
  C) $\sqrt{6}$
  D) $\sqrt{10}$
  Show Answer
  The correct answer is A .
• Question 1463:

  Evaluate $\int x^2\text{Sin}x\mathrm{\Delta }x$

  Options:
  A) −Cos x + 2xSin x + C
  B) −Cos x + 2
  C) x²Cos x + 2xSin x + 2Cos x+ C
  D) −x²Cos x + 2xSinx + 2Cos x + C
  Show Answer
  The correct answer is D .
• Question 1464: If 3x - $\frac{1}{4}$^{-$\frac{1}{2}$} > $\frac{1}{4}$ - x, then the interval of values of x is
  Options:
  A) x > $\frac{1}{3}$
  B) x < $\frac{1}{3}$
  C) x < $\frac{1}{4}$
  D) x < $\frac{9}{16}$
  E) x > $\frac{9}{16}$
  Show Answer
  The correct answer is E .
• Question 1465: Given that log_a2 = 0.693 and log_a3 = 1.097, find log_a 13.5 Options:
  A) 1.404
  B) 1.790
  C) 2.598
  D) 2.790
  Show Answer
  The correct answer is C .
• Question 1466: If y = x² - $\frac{1}{x}$, find $\frac{\delta y}{\delta x}$ Options:
  A) 2x - $\frac{1}{x^2}$
  B) 2x + x²
  C) 2x - x²
  D) 2x + $\frac{1}{x^2}$
  Show Answer
  The correct answer is D .
• Question 1467:

  Evaluate:

  (0.21 x 0.072 x 0.00054) (0.006 x 1.68 x 0.063), correct to 4.s.f

  Options:
  A) 0.01286
  B) 0.01285
  C) 0.1286
  D) 0.1285
  Show Answer
  The correct answer is A .
• Question 1468: The solutions of x² - 2x - 1 = 0 are the points of intersection of two graphs. if one of the graphs is y = 2 + x - x², find the second graph Options:
  A) y = 1 - x
  B) y = 1 + x
  C) y = x - 1
  D) y = 3x + 3
  Show Answer
  The correct answer is A .
• Question 1469: A girl on top of a storey building 36m high dropped a N10.00 note on the ground below. If the angle of depression of the N10.00 note is 35°, how far is the money from the girl? Options:
  A) 20.64m
  B) 29.48m
  C) 44.49m
  D) 49.55m
  E) 62.76m
  Show Answer
  The correct answer is E .
• Question 1470: If y = 243(4x + 5)^-2, find $\frac{dy}{dx}$ when x = 1 Options:
  A) $\frac{-8}{3}$
  B) $\frac{3}{8}$
  C) $\frac{9}{8}$
  D) -$\frac{8}{9}$
  Show Answer
  The correct answer is A .