Number bases - Jamb Mathematics Past Questions and Answers

Question 21:

• JAMB 1984

A trader in country where their currency 'MONI'(M) is in base five bought 103₅ oranges at M14₅ each. If he sold the oranges at M24₅ each, what will be his gain?

A. 103₅
B. 1030₅
C. 102₅
D. 2002₅
E. 3032₅

Question 22:

• JAMB 1985

In the equation below, Solve for x if all the numbers are in base 2: \(\frac{11}{x}\) = \(\frac{1000}{x + 101}\)

A. 101
B. 11
C. 110
D. 111
E. 10

Question 23:

• JAMB 1987

Convert 241 in base 5 to base 8,

A. 71₈
B. 107₈
C. 176₈
D. 241₈

Question 24:

• JAMB 1987

Convert 241 in base 5 to base 8,

A. 71₈
B. 107₈
C. 176₈
D. 241₈

Question 25:

• JAMB 1987

Reduce each number to two significant figures and then evaluate \(\frac{0.021741 \times 1.2047}{0.023789}\)

A. 0.8
B. 0.9
C. 1.1
D. 1.2