Mathematics 2005 JAMB Past Questions

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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.

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

An operation * is defined on the set of real numbers by a * b = ab + 2(a + b + 1). find the identity element

In the diagram above calculate the value of x

Three straight lines EF, GH and LK interest at O as shown above. If ∠KOF = 52^o and ∠LOH = 85^o, calculate the size of ∠EOG.