Waec Mathematics 2012 Past Questions and Answers

Question 31:

• WAEC 2012

A side and a diagonal of a rhombus are 10cm and 12cm respectively, Find its area

A. 20cm²
B. 24cm²
C. 48cm²
D. 96cm²

Question 32:

• WAEC 2012

Factorise completely: 32x²y - 48x³y³

A. 16x²y(2 - 3xy²)
B. 8xy(4x - 6x²y²)
C. 8x²y(4 - 6xy²)
D. 16xy(2x - 3x²y²)

Question 33:

• WAEC 2012

If x and y are variables and k is a constant, which of the following describes an inverse relationship between x and y?

A. Y = kx
B. Y = \(\frac{k}{x}\)
C. Y = k\(\sqrt{x}\)
D. Y = x + k

Question 34:

• WAEC 2012

If x and y are variables and k is a constant, which of the following describes an inverse relationship between x and y?

A. Y = kx
B. Y = \(\frac{k}{x}\)
C. Y = k\(\sqrt{x}\)
D. Y = x + k

Question 35:

• WAEC 2012

In the diagram, |QR| = 10m, |SR| = 8m
< QPS = 30^o, < QRP = 90^o and |PS| = x, Find x

A. 1.32m
B. 6.32m
C. 9.32m
D. 17.32