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626
Evaluate \(\begin{vmatrix} 4 & 2 & -1 \\ 2 & 3 & -1 \\ -1 & 1 & 3 \end{vmatrix}\)
  • A. 25
  • B. 45
  • C. 15
  • D. 55
View Answer & Discuss (1) JAMB 2011
627
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. \(\frac{1}{5}\) \(\begin{vmatrix} 4 & 3 \\ 1 & 2\end{vmatrix}\)
View Answer & Discuss JAMB 2011
628
What is the size of each interior angle of a 12-sided regular polygon?
  • A. 120o
  • B. 150o
  • C. 30o
  • D. 180o
View Answer & Discuss (1) JAMB 2011
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629

A chord of circle of radius 7cm is 5cm from the centre of the circle.What is the length of the chord?

  • A. 4√6 cm
  • B. 3√6 cm
  • C. 6√6 cm
  • D. 2√6 cm
View Answer & Discuss (2) JAMB 2011
630
A solid metal cube of side 3 cm is placed in a rectangular tank of dimension 3, 4 and 5 cm. What volume of water can the tank now hold
  • A. 48 cm3
  • B. 33 cm3
  • C. 60 cm3
  • D. 27 cm3
View Answer & Discuss JAMB 2011
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