WAEC Mathematics questions: Number bases

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

All topics Binary operations · 13 Coordinate geometry · 20 Euclidean geometry · 26 Fractions, decimals, approximations and percentages · 29 Indices, logarithms and surds · 29 Inequalities · 17 Loci · 12 Mensuration · 27 Number bases · 24 Polynomials · 29 Probability · 23 Progressions · 22 Sets · 22 Statistics · 26 Trigonometry · 26 Variation · 19

Question 21· Number bases· WAEC
Express 213₄ as a number in base ten.
Explanation and discussion
Question 22· Number bases· WAEC
Add 1101₂ and 1011₂, giving the answer in base two.
Explanation and discussion
Question 23· Number bases· WAEC
Find the value of x if 23ₓ = 17 (base ten).
Explanation and discussion
Question 24· Number bases· WAEC
Express 87 (base ten) in base five.
Explanation and discussion

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