Mathematics 2005 NECO Past Questions

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If A(I,2,3,...,10) ; B = (-5,-4,.....,-1) ; C = (-1, 0, 1, 2,....5) List all the elements in (B ∪ C) ∩ A

A. (-1,2,...5)
B. (-1,1,....5)
C. (1,2,..5)
D. (2,3,...10)
E. (1,2,...10)

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What is the positive difference between the squares of 2.5 and 2.1 to 1 significant figures?

A. – 2.0
B. – 184
C. -1.84
D. 2
E. 18.4

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Find the value of 2a - b if a + b = 8 and 4a - b = 22

A. 2
B. 4
C. 6
D. 8
E. 10

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A flagpole is placed at the top of a tower. The angles of elevation of the bottom and top of the flagpole from a point on the ground 10m away are 40° and 50° respectively. Find the length of the flagpole.

A. 1.8m
B. 3.5m
C. 8.4m
D. 11.9m
E. 17.3m

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Find the Iength of a diagonal of a square whose area is 288cm².

A. 24cm
B. 48cm
C. 95cm
D. 100cm
E. 124cm

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