Jamb 1980 Mathematics Questions
Question 21:
In triangle FGB, < G = 90o, < H = 60o, while in triangle XYZ, < X = 60o and < Y = 30o. Form XYZ write down the ratio equal to \(\frac{FG}{FH}\)
- A \(\frac{YX}{ZX}\)
- B \(\frac{YX}{YZ}\)
- C \(\frac{ZX}{YZ}\)
- D \(\frac{YZ}{XY}\)
Question 22:
A pentagon has four of its angles equal. If the size of the fifth angle is 60o, Find the size of each of the four equal angles.
- A 60<sup style='font-size: smaller;'>o</sup>
- B 108<sup style='font-size: smaller;'>o</sup>
- C 120<sup style='font-size: smaller;'>o</sup>
- D 150<sup style='font-size: smaller;'>o</sup>
- E None of the above
Question 23:
Find the product of (2\(\sqrt{y - 3y}\)) and (3y = 2y)
- A 4y = y<sup style='font-size: smaller;'>2</sup>
- B 4y + 9y<sup style='font-size: smaller;'>2</sup>
- C 4y - 9y<sup style='font-size: smaller;'>2</sup>
- D -4y - 9y<sup style='font-size: smaller;'>2</sup>
- E 2y + y<sup style='font-size: smaller;'>2</sup>
Question 24:
(\(\frac{x^a}{x^b}\))a + b by (\(\frac{x^{a + b}}{x^{a - b}}\))\(\frac{a^2}{b}\)
- A X<sup style='font-size: smaller;'>-a2</sup>
- B X<sup style='font-size: smaller;'>b2</sup>
- C X<sup style='font-size: smaller;'>a2 - b2</sup>
- D \(\frac{1}{x^{a2 + b2}}\)
- E X<sup style='font-size: smaller;'>b2 - a2</sup>
Question 25:
What will be the value of k so that the quadratic equation kx2 - 4x + 1 = 0 has two equal roots?
- A 2
- B 3
- C 4
- D 8
- E \(\frac{1}{4}\)