Jamb Mathematics 2023 Past Questions and Answers

Question 36:

• JAMB 2023

The interior angle of a regular polygon is five times the size of its exterior angle. Identify the polygon.

A. Dodecagon
B. Enneadecagon
C. Icosagon
D. Hendecagon

Question 37:

• JAMB 2023

The area A of a circle is increasing at a constant rate of 1.5 cm\(^2s^{-1}\). Find, to 3 significant figures, the rate at which the radius r of the circle is increasing when the area of the circle is 2 cm\(^2\).

A. 0.200 cms\(^{-1}\)
B. 0.798 cms\(^{-1}\)
C. 0.300 cms\(^{-1}\)
D. 0.299 cms\(^{-1}\)

Question 38:

• JAMB 2023

Make x the subject of the formula: y = \(\frac {3x - 9c}{4x + 5d}\)

A. X = \(\frac {-(9c - 5dy)}{4y - 3}\)
B. X = \(\frac {9c + 5dy}{4y - 3}\)
C. X = \(\frac {9c - 5dy}{4y - 3}\)
D. X = \(\frac {-(9c + 5dy)}{4y - 3}\)

Question 39:

• JAMB 2023

Solve for x: 3(x – 1) ≤ 2 (x – 3)

A. X ≤ -3
B. X ≥ -3
C. X ≤ 3
D. X ≥ 3

Question 40:

• JAMB 2023

The diagram above is a circle with centre C. P, Q and S are points on the circumference. PS and SR are tangents to the circle. ∠PSR = 36\(^o\). Find ∠PQR

A. 72\(^0\)
B. 36\(^0\)
C. 144\(^0\)
D. 54\(^0\)