Number bases - Jamb Mathematics Past Questions and Answers

Question 16:

• JAMB 1980

Write the decimal number 39 to base 2

A. 10011 base 2
B. 110111 base 2
C. 111001 base 2
D. 100101 base 2
E. 19.5 base 2

Question 17:

• JAMB 1981

Evaluate correct to 4 decimal places 827.51 x 0.015

A. 8.8415
B. 12.4127
C. 124.1265
D. 12.4120
E. 114.1265

Question 18:

• JAMB 1981

The number 25 when converted from the tens and units base to the binary base (base two) is one of the following

A. 10011
B. 111011
C. 111000
D. 11001
E. 110011

Question 19:

• JAMB 1982

The currency used in a country is called 'Matimalik'(M) and is of base seven. A lady in that country bought 4 bags of rice at M56 per bag and and 3 tins of milk at M4 per tin. What is the total cost of the item she bought?

A. M246₇
B. M242₇
C. M236₇
D. M341₇
E. M338₇

Question 20:

• JAMB 1983

Find x if (x\(_4\))\(^2\) = 100100\(_2\)

A. 6
B. 12
C. 100
D. 210
E. 110