2009 - WAEC Mathematics Past Questions and Answers - page 1

(3(\frac{1}{2} + 4\frac{1}{3}) \div (\frac{5}{6} - \frac{2}{3})) = (7(\frac{3 + 2}{6}) \div \frac{(5 - 4)}{6})

7(\frac{5}{6} \div \frac{1}{6} = \frac{47}{6} \times \frac{6}{1}) = 47

N1122 = $8; x = $36

x x $8 = N1122 x $36

(\frac{N1122 \times $36}{$8}) = x

x = N5049

log ((\frac{28}{3}) = \log (\frac{7 \times 4}{3}))

= log 7 + log 4 - log 3

log 7 + log 2² - log 3 = log 7 + 2 - log 3

= x + 2x - y

= 2x + x - y

22_three, 34_five, 21_six = (2 x 3)(2 x 3^o), (3 x 5¹) = (4 x 5⁰), (2 x 6¹) + (1 x 6⁰)

= (6 + 2), (15 + 4), (12 + 1) = 8_ten, 29_ten, 13_ten in descending order

29_ten, 13_ten, 8_ten = 34_five, 21_six, 22_three

A = P + I

p + (\frac{PRT}{100})

A = N3000 (1 + (\frac{6 \times 5}{100}))

= N3000(1 + 0.3)

A = N3000 (1.3)

= N3,900.00

(\sqrt{0.000144}) = 0.012

= 1.2 x 10^-2

(\frac{3}{2x} - \frac{2}{3x} = 4)

(\frac{9 - 4}{6x}); (\frac{5}{6x}) = 4

5 = 24x ; x = (\frac{5}{24})

(2x + 3 )² = 125

2n + 3 = 3(\sqrt{125})

2x + 3 = 5

2x = 5 - 3

x = (\frac{2}{2})

= 1

x² - 2x - 3xy + 6y = x(x - 2) -3y(x - 2)

= (x - 3y)(x - 2)