Jamb Mathematics Past Questions For Year 1989
Question 6
What is the different between 0.007685 correct to three significant figures and 0.007685 correct to four places of decimal?
- A. 10-5
- B. 7 x 10-4
- C. 8 x 10-5
- D. 10-6
Question 7
If a : b = 5 : 8, x : y = 25 : 16; evaluate \(\frac{a}{x}\) : \(\frac{b}{y}\)
- A. 125 : 128
- B. 3 : 5
- C. 3 : 4
- D. 2 : 5
Question 8
Oke deposited N800.00 in the bank at the rate of 12\(\frac{1}{2}\)% simple interest. After some time the total amount was one and half times the principal. For how many years was the money left in the bank?
- A. 2\(\frac{2}{3}\)
- B. 4
- C. 5\(\frac{1}{3}\)
- D. 8
Question 9
If the surface area of a sphere increased by 44%, find the percentage increase in diameter
- A. 44
- B. 30
- C. 22
- D. 20
Question 10
Simplify \(4 - \frac{1}{2 - \sqrt{3}}\)
- A. 2\(\sqrt{3}\)
- B. -2 - \(\sqrt{3}\)
- C. -2 + \(\sqrt{3}\)
- D. 2 - \(\sqrt{3}\)
