Jamb Mathematics Past Questions and Answers

Question 1961:

• JAMB 2009

Find to infinity, the sum of the sequence \(1, \frac{9}{10}, \left(\frac{9}{10}\right)^2, \left(\frac{9}{10}\right)^3,.....\)

A. 10
B. 9
C. ¹⁰/₉
D. ⁹/₁₀

Question 1962:

• JAMB 2009

If m * n = n - (m+2) for any real number m and n find he value of 3*(-5)

A. -6
B. -8
C. -10
D. -12

Question 1963:

• JAMB 2009

A binary operation ⊗ defined on the set of integers is such that m⊗n = m + n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0

A. -⁵/₄
B. -⁵/₆
C. Zero
D. 5

Question 1964:

• JAMB 2009

If Q is\( \left[ \begin{array}{cc}
9 & -2 \\
-7 & 4 \\
\end{array} \right]\) , then |Q| is

A. -50
B. -22
C. 22
D. 50

Question 1965:

• JAMB 2009

If P \(=\left[\begin{array}{cc}x+3 & x+2\\
x+1 & x-1\end{array}\right]\) evaluate x if |P| = -10

A. -5
B. -2
C. 2
D. 5