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Mathematics Past Questions

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49 questions JAMB 2359 WAEC 1853 NECO 179 POST_UTME 6 CUSTOM 10

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49 questions

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Question 21

jamb 1980

Find the roots of the equation 10x² - 13x - 3 = 0

Ax = \(\frac{3}{5}\) or -\(\frac{1}{2}\)

Bx = \(\frac{3}{10}\) or -1

Cx = \(\frac{3}{10}\) or 1

Dx = \(\frac{1}{5}\) or \(\frac{-3}{2}\)

Ex = -\(\frac{1}{5}\) or \(\frac{3}{2}\)

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Question 22

jamb 1980

List all integer values of x satisfying the inequality -1 < 2x - 5 \(\leq\) 5

B3, 4, 5

C2, 3, 4

D3, 4

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Question 23

jamb 1980

The median of the set of numbers 4, 9, 4, 13, 7, 14, 10, 17 is

A13

C\(\frac{19}{2}\)

D\(\frac{39}{4}\)

E10

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Question 24

jamb 1980

When a dealer sells a bicycle for N81 he makes a profit of 8%. What did he pay for the bicycle?

AN73

BN74.52

CN75

DN87.48

EN75.52

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Question 25

jamb 1980

Rationalize the denominator of the given expression \(\frac{\sqrt{1 + a} - \sqrt{a}}{\sqrt{1 + a} + \sqrt{a}}\)

A1 + 2a - 2\(\sqrt{a(1 + a)}\)

B\(\sqrt{1(1 + a)}\)

C2a - 2\(\sqrt{a(1 + a)}\)

D1 + 2a - 2\(\sqrt{a + b}\)

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Question 26

jamb 1980

Which of the following is NOT a factor of 12\(^{4}\) - 5\(^{4}\)?

B13

C17

D49

E169

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Question 27

jamb 1980

Evaluate \((2^{0} + 4^{-\frac{1}{2}})^{2}\)

A\(\frac{1}{4}\)

B\(\frac{5}{4}\)

C\(\frac{9}{4}\)

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Question 28

jamb 1980

Write down the number 0.0052048 correct to three significant figures

A0.005

B0.0052

C0.00520

D5.2048

E5204

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Question 29

jamb 1980

Find, correct to three significant figures, the value of \(\sqrt{41830}\).

A205

B647

C2050

D6470

E64.7

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