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Mathematics 2015 JAMB Past Questions

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51
Calculate the value of x and y if (27x ÷ 81x+2y = 9 ,x + 4y = 0
  • A. x = 1, y = 1/2
  • B. x = 2, y = – 1/2
  • C. x − 0, y = 1
  • D. x = 2, y = –1
View Answer & Discuss JAMB 2015
52

Simplify \(\sqrt{30}\) × \(\sqrt{40}\)

  • A. 10 √3
  • B. 5 √3
  • C. 20 √3
  • D. 15 √3
View Answer & Discuss (3) JAMB 2015
53
If √ (2x + 2) − √x =1 ,find x.
  • A. x = 1 twice
  • B. x = 0 or 1
  • C. x = 3 or 1
  • D. x = 2 twice
View Answer & Discuss (1) JAMB 2015
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54

The sum of two numbers is 5; their product is -14. Find the numbers.

  • A. x = 5 or 1
  • B. x = 7 or 1
  • C. x = 7 or 0
  • D. x = 7 or − 2
View Answer & Discuss (3) JAMB 2015
55
Solve the equation
\( 5^{(x − 2)} = (1 ÷ 125)^{(x +3)}\)
  • A. 3/2
  • B. − 7/4
  • C. 4/7
  • D. 7/4
View Answer & Discuss (5) JAMB 2015
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