Mathematics JAMB Past Questions

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236

The weight W kg of a metal bar varies jointly as its length L meters and the square of its diameter d meters. If w = 140 when d = 42/3 and L = 54, find d in terms of W and L.

A. \(\sqrt{\frac{42W}{5L}}\)
B. \(\sqrt{\frac{6L}{42W}}\)
C. \(\frac{42W}{5L}\)
D. \(\frac{5L}{42W}\)

View Answer & Discuss (6) JAMB 2005

237

Find the range of values of x for which 7x - 3 > 25 + 3x

A. x >7
B. x<7
C. x>-7
D. x<-7

View Answer & Discuss JAMB 2005

238

The diagram above is the graph of the function f(x). Determine the range of values of x for which f(x) \(\leq\) 0

A. x \(\leq\) 2
B. 0 \(\leq\) x \(\leq\) 2
C. -2 \(\leq\) x \(\leq\) 0, x \(\geq\) 2
D. x \(\leq\) -2, 0 \(\leq\) x \(\leq\) 2

View Answer & Discuss (10) JAMB 2005

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239

If the 7th term of an AP is twice the third term and the sum of the first four terms is 42, find the common difference.

A. 6
B. 3
C. 2
D. 1

View Answer & Discuss (2) JAMB 2005

240

Find the sum of the first 20 terms of the series 8, 12, 16, ....., 96

A. 1400
B. 1040
C. 960
D. 920

View Answer & Discuss (9) JAMB 2005

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