Mathematics NECO Past Questions

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121

A surveyor measured the length of a obtained 42.55 metres. If his measurement was more than the actual length and the percentage error of his measurement was 8%, calculate the actual length of the land

A. 39.40 metres
B. 46.20 metres
C. 46.25 metres
D. 46.50 metres
E. 48.25 metres

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122

If x + \(\frac{1}{x}\) = 8, find x\(^2\) + \(\frac{1}{x^2}\)

A. 64
B. 62
C. 32
D. 16
E. 4

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123

Evaluate 0.0025 × 2.5 × 102 to 2 significant figures.

A. 0.625 × 10^-3
B. 0.63 × 10^-2
C. 6.25 × 10^-3
D. 6.3 × 10^-2
E. 6.3 × 10^-1

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124

What is the Value of 11101\(_{two}\)+ 10011\(_{two}\) - 10001\(_{two}\)?

A. 10001\(_{two}\)
B. 10011\(_{two}\)
C. 10111\(_{two}\)
D. 11111\(_{two}\)
E. 111111\(_{two}\)

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125

A ship sails 6km from a port on a bearing 070° and then 8km on a bearing of 040°. Find the distance from the port.

A. 7.21km
B. 13.53km
C. 16.86km
D. 44.57km
E. 67.17km

View Answer & Discuss (5) NECO 2005

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