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WAEC WASSCE Mathematics 2003 past questions and answers

This 2003 WAEC WASSCE Mathematics set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2003 set with instant marking.

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Sample WAEC WASSCE Mathematics 2003 questions

1. In the universal set U = {1, 2, ..., 12}, let A be the set of multiples of 2 and B the set of multiples of 3. How many elements are in A union B?
  1. 8
  2. 7
  3. 9
  4. 10

Answer: A. 8

There are 6 multiples of 2 and 4 multiples of 3, with 2 common multiples, so the union has 6 + 4 - 2 = 8 elements.

2. A sum of N720 is shared among three people in the ratio 2:3:4. How much does the person with the largest share receive?
  1. N240
  2. N320
  3. N360
  4. N400

Answer: B. N320

The largest share is 4/9 of N720, which is N320.

3. Convert 101101 in base two to base ten.
  1. 43
  2. 44
  3. 45
  4. 46

Answer: C. 45

The value is 1(32) + 0(16) + 1(8) + 1(4) + 0(2) + 1 = 45.

4. A length is recorded as 7.2 cm to the nearest 0.1 cm. Which interval contains the actual length x?
  1. 7.10 <= x < 7.20
  2. 7.20 <= x < 7.30
  3. 7.15 < x <= 7.25
  4. 7.15 <= x < 7.25

Answer: D. 7.15 <= x < 7.25

Rounding to the nearest 0.1 cm gives a lower bound of 7.15 cm inclusive and an upper bound of 7.25 cm exclusive.

5. If 3^(x + 1) = 81, find x.
  1. 3
  2. 4
  3. 2
  4. 5

Answer: A. 3

Since 81 = 3^4, x + 1 = 4 and therefore x = 3.

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