JAMB Mathematics 2007 Objective — Question 4

Question 4 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2007 Objective paper, with the correct answer and a full explanation.

Evaluate [(0.5625)^2 - (0.4375)^2] / 0.04, correct to 3 significant figures.

A. 3.13Correct
B. 3.12
C. 3.11
D. 0.313

Explanation

Using difference of two squares: (0.5625+0.4375)(0.5625-0.4375)/0.04 = 1 x 0.125/0.04 = 3.125, which rounds to 3.13 (3 s.f.).

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