Jamb Mathematics Past Questions and Answers

Question 2066:

• JAMB 2011

Evaluate \(\begin{vmatrix} 4 & 2 & -1 \\ 2 & 3 & -1 \\ -1 & 1 & 3 \end{vmatrix}\)

A. 25
B. 45
C. 15
D. 55

Question 2067:

• JAMB 2011

The inverse of matrix N = \(\begin{vmatrix} 2 & 3 \\
1 & 4\end{vmatrix}\) is

A. \(\frac{1}{5}\) \(\begin{vmatrix} 2 & 1 \\ 3 & 4\end{vmatrix}\)
B. \(\frac{1}{5}\) \(\begin{vmatrix} 4 & -3 \\ -1 & 2\end{vmatrix}\)
C. \(\frac{1}{5}\) \(\begin{vmatrix} 2 & -1 \\ -3 & 4\end{vmatrix}\)
D. \(\frac{1}{5}\) \(\begin{vmatrix} 4 & 3 \\ 1 & 2\end{vmatrix}\)

Question 2068:

• JAMB 2011

What is the size of each interior angle of a 12-sided regular polygon?

A. 120^o
B. 150^o
C. 30^o
D. 180^o

Question 2069:

• JAMB 2011

A circle of perimeter 28cm is opened to form a square. What is the maximum possible area of the square?

A. 56cm²
B. 49cm²
C. 98cm²
D. 28cm²

Question 2070:

• JAMB 2011

A chord of circle of radius 7cm is 5cm from the centre of the maximum possible area of the square?

A. 4√6 cm
B. 3√6 cm
C. 6√6 cm
D. 2√6 cm