Jamb Mathematics Past Questions For Year 1981
Question 16
By selling an article for N45.00 a man makes a profit of 8%. For how much should he have sold it in order to make a profit of 32%?
- A. N180.00
- B. N59.00
- C. N63.00
- D. N58.00
- E. N55.00
Question 17
An isosceles triangle of sides 13cm, 13cm, 10cm is inscribed in a circle. What is the radius of the circle?
- A. 7cm
- B. 12cm
- C. 8cm
- D. 9cm
- E. 69cm
Question 18
A micrometer is defined as one millionth of a millimeter. A length of 12,000 micrometres may be represented as
- A. 0.012m
- B. 0.0000012m
- C. 0.000012m
- D. 0.00000012m
- E. 0.000000012m
Question 19
In one and a half hours, the minute hand of a clock rotates through an angle of
- A. 90°
- B. 180°
- C. 640°
- D. 450°
- E. 540°
Question 20
Simplify \(\frac{\sqrt{2}}{\sqrt{3} - \sqrt{2}}\) - \(\frac{3 - 2}{\sqrt{3} + \sqrt{2}}\)
- A. 2\(\sqrt{2} - \sqrt{3}\)
- B. 3(\(\sqrt{6}\) - 1)
- C. \(\sqrt{6}\) - 3
- D. -\(\frac{1}{2}\)
- E. \(\frac{-\sqrt{3}}{\sqrt{2} - \sqrt{2}}\)
