JAMB and WAEC Mathematics questions: Number bases

49 questions with answers and explanations. Tap an option to check yourself.

All JAMB WAEC

Question 21· Number bases· JAMB
Which of these numbers is the largest? 1011₂, 23₅, 15₈, 1111₃
Explanation and discussion
Question 22· Number bases· JAMB
Subtract 101 (base 2) from 1100 (base 2), giving the answer in base 2.
Explanation and discussion
Question 23· Number bases· JAMB
Add 234 (base 5) and 143 (base 5), giving the answer in base 5.
Explanation and discussion
Question 24· Number bases· WAEC
Express 47 (base ten) in base five.
Explanation and discussion
Question 25· Number bases· JAMB
Convert 1010 (base 2) to base 5.
Explanation and discussion
Question 26· Number bases· JAMB
Find the digit x if 2x1 (base 3) = 22 (base 10).
Explanation and discussion
Question 27· Number bases· WAEC
Convert 100 in base ten to base eight.
Explanation and discussion
Question 28· Number bases· WAEC
Subtract 34₅ from 102₅.
Explanation and discussion
Question 29· Number bases· WAEC
Convert 45 in base ten to base two.
Explanation and discussion
Question 30· Number bases· JAMB
Evaluate 12 (base 3) × 2 (base 3), giving the answer in base 3.
Explanation and discussion
Question 31· Number bases· JAMB
Convert 213 (base 4) to base 10.
Explanation and discussion
Question 32· Number bases· JAMB
Express 25 (base 10) in base 2.
Explanation and discussion
Question 33· Number bases· WAEC
Convert 101101₂ to a number in base ten.
Explanation and discussion
Question 34· Number bases· WAEC
Multiply 23₅ by 4₅ and give the answer in base five.
Explanation and discussion
Question 35· Number bases· WAEC
In which base is 31 equal to 16 in base ten?
Explanation and discussion
Question 36· Number bases· WAEC
Convert 25 (base ten) to a number in base two.
Explanation and discussion
Question 37· Number bases· JAMB
Express 45 (base 10) in base 3.
Explanation and discussion
Question 38· Number bases· JAMB
Convert 1011 (base 2) to base 10.
Explanation and discussion
Question 39· Number bases· JAMB
Express 100 (base 10) in base 5.
Explanation and discussion
Question 40· Number bases· JAMB
If 23 (base x) = 11 (base 10), find x.
Explanation and discussion

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JAMB and WAEC Mathematics questions: Number bases

Which of these numbers is the largest? 1011₂, 23₅, 15₈, 1111₃

Subtract 101 (base 2) from 1100 (base 2), giving the answer in base 2.

Add 234 (base 5) and 143 (base 5), giving the answer in base 5.

Express 47 (base ten) in base five.

Convert 1010 (base 2) to base 5.

Find the digit x if 2x1 (base 3) = 22 (base 10).

Convert 100 in base ten to base eight.

Subtract 34₅ from 102₅.

Convert 45 in base ten to base two.

Evaluate 12 (base 3) × 2 (base 3), giving the answer in base 3.

Convert 213 (base 4) to base 10.

Express 25 (base 10) in base 2.

Convert 101101₂ to a number in base ten.

Multiply 23₅ by 4₅ and give the answer in base five.

In which base is 31 equal to 16 in base ten?

Convert 25 (base ten) to a number in base two.

Express 45 (base 10) in base 3.

Convert 1011 (base 2) to base 10.

Express 100 (base 10) in base 5.

If 23 (base x) = 11 (base 10), find x.