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Mathematics Past Questions

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

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92 questions

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Question 41

jamb 1999

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.

A2/3

B1/2

C-1/2

D-2/3

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Question 42

jamb 1999

The sum of two numbers is twice their difference. If the difference of the numbers is P, find the larger of the two numbers

Ap/2

B3p/2

C5p/2

D3p

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Question 43

jamb 1999

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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Question 44

jamb 1999

Simplify \(\sqrt{\frac{(0.0023 \times 750)}{(0.00345 \times 1.25)}}\)

A15

B20

C40

D75

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Question 45

jamb 1999

If 2\(_9\) x (Y3)\(_9\) = 3\(_5\) x (Y3)\(_5\), find the value of Y.

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Question 46

jamb 1999

What is the answer when 2434\(_6\) is divided by 42\(_6\)?

A23₆

B35₆

C52₆

D55₆

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Question 47

jamb 1999

A trader bought 100 oranges at 5 for N1.20, 20 oranges got spoilt and the remaining were sold at 4 for N1.50. Find the percentage gain or loss.

A30% gain

B25% gain

C30% loss

D25% loss

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Question 48

jamb 1999

If \(\frac{({a^2b^{-3}c})^{3/4}}{a^{-1}b^4c^5}\) = \(a^p b^q c^r\); what is the value of p+2q?

A(5/2)

B-(5/4)

C-(25/4)

D-10

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Question 49

jamb 1999

Find the matrix T if ST = I where S = \(\begin{pmatrix} -1 & 1 \\ 1 & -2 \end{pmatrix}\)

A\(\begin{pmatrix} -2 & -1 \\ -1 & -1 \end{pmatrix}\)

B\(\begin{pmatrix} -2 & -1 \\ -1 & 1 \end{pmatrix}\)

C\(\begin{pmatrix} -1 & -1 \\ 0 & -1 \end{pmatrix}\)

D\(\begin{pmatrix} -1 & 1 \\ 0 & 1 \end{pmatrix}\)

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Question 50

jamb 1999

Find the value of X if \(\frac{\sqrt{2}}{x+\sqrt{2}}=\frac{1}{x-\sqrt{2}}\)

A3√2+4

B3√2-4

C3-2√2

D4+2√2

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Question 51

jamb 1999

If log\(_810\) = X, evaluate log\(_85\) in terms of X.

A\(\frac{1}{2}\)X

BX-\(\frac{1}{4}\)

CX-\(\frac{1}{3}\)

DX-\(\frac{1}{2}\)

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Question 52

jamb 1999

A group of market women sell at least one of yam, plantain and maize. 12 of them sell maize, 10 sell yam and 14 sell plantain. 5 sell plantain and maize, 4 sell yam and maize, 2 sell yam and plantain only while 3 sell all the three items. How many women are in the group?

A25

B19

C18

D17

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