Jamb Mathematics Past Questions For Year 1991

Question 11

Evaluate \(\frac{xy^2 - x^2y}{x^2 - xy^1}\) When x = -2 and y = 3

jamb 1991

• A. 3
• B. -\(\frac{3}{5}\)
• C. \(\frac{3}{5}\)
• D. -3

Question 12

If w varies inversely as \(\frac{uv}{u + v}\) and is equal to 8 when

u = 2 and v = 6, find a relationship between u, v, w.

jamb 1991

• A. uvw = 16(u + v)
• B. 16ur = 3w(u + v)
• C. uvw = 12(u + v)
• D. 12uvw = u + v

Question 13

If g(x) = \(x^2+ 3x + 4\), find g(x + 1) - g(x)

jamb 1991

• A. (x + 2)
• B. 2(x + 2)
• C. (2x + 1)
• D. \((x^2 + 4)\)

Question 14

Factorize \(m^3 - 2m^2 - m + 2\)

jamb 1991

• A. (m\(^2\) + 1)(m - 2)
• B. (m - 1)(m + 1)(m + 2)
• C. (m - 2)(m + 1)(m - 1)
• D. (m\(^2\) + 2)(m - 1)

Question 15

Factorize 1 - (a - b)\(^2\)

jamb 1991

• A. (1 - a - b)(1 - a + b)
• B. (1 + a - b)(1 - a + b)
• C. (1 - a + b)(1 - a + b)
• D. (1 + a + b)(1 + a + b)