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An operation * is defined on the set of real numbers by a*b = a + b + 1. If the identity elements is -1, find the inverse of the element 2 under *.

A. 4
B. zero
C. -2
D. -4

View Answer & Discuss (3) JAMB 2001

The sixth term of an A.P is half of its twelfth term. The first term of the A.P is equal to

A. zero
B. half of the common difference
C. double the common difference
D. the common difference

View Answer & Discuss (2) JAMB 2001

Factorize 4x² - 9y² + 20x + 25

A. (2x -3y + 5)(2x - 3y - 5)
B. (2x - 3y)(2x + 3y)
C. (2x - 3y +5)(2x + 3y + 5)
D. (2x + 5)(2x - 9y +5)

View Answer & Discuss JAMB 2001

A sector of a circle of radius 7.2cm which subtends an angle of 300° at the centre is used to form a cone. What is the radius of the base of the cone?

A. 8cm
B. 6cm
C. 9cm
D. 7cm

View Answer & Discuss (1) JAMB 2001

A point P moves such that it is equidistant from Points Q and R. Find QR when PR = 8cm and angle PRQ = 30°

A. 4√3cm
B. 8cm
C. 8√3cm
D. 4cm

View Answer & Discuss (4) JAMB 2001

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