### Mathematics Past Questions

4386

(a) A man shared his property among his children as follows:

 Child's name Ann Afia Kojo Nuno Akom Percentage share 5 15 10 45 25

Represent the information on a pie chart

(b) A box contains 5 red, 3 green and 4 blue identical beads. Calculate the probability th a girl takes away two red beads, one after the other, from the box.

WAEC 2021
4387

.(a) In a class of 80 students,$$\frac{3}{4}$$ study Biology and $$\frac{3}{5}$$ study Physics.

If each student studies at least one of the subjects: (i) draw a Venn diagram to represent this information

(ii) how many students study both subjects

(iii) find the fraction of the class that study Biology but not Physics.

(b) Johnson and Jocatol Ltd. owned a business office with floor measuring 15m by 8 m which was to be carpeted.

The cost of carpeting was Gh¢ 890.00 per square metre. If a total of GH 216,120.00 was spent on painting and carpeting, how much was the cost of painting?

WAEC 2021
4388

(a) Copy and complete the table of values for the relation y=2x$$^2$$ - x - 2 for 4 ≤ x ≤ 4.

 x -4 -3 -2 -2 0 1 2 3 4 y 19 -2 26

(b) Using a scale of 2 cm to 1 unit on the x-axis and 2 cm to 5 units on the y-axis, draw the graph of  y = 2x$$^2$$ - x - 2 for 4 ≤ x ≤ 4.

(c) On the same axes, draw the graph of y = 2x + 3.

(d) Use the graph to find the: (i) roots of the equation 2x-3r-5 0; (i) range of values of x for which 2x$$^2$$ -x - 2<0.

WAEC 2021
4389

.(a) In APQR, ∠PQR= 90°. If its area is 216cm$$^2$$ and |PQ|:|QR| is 3:4, find |PR|.

(b) The present ages of a man and his son are 47 years and 17 years respectively. In how many years would the man's age be twice that of his son?

WAEC 2021
4390

In the diagram, $$\overline{PQ//RS}$$ is a trapezium with QR//PS. U and T are points on $$\overline{PS}$$ such that $$\overline{|PU|}$$ = 5 cm,

$$\overline{|QU|}$$ = 12 cm and ∠PUQ= ∠STR =90°. If the area of PQR = 20 cm$$^2$$,

calculate, correct to the nearest whole number, the:

(a) perimeter; (b) area; of the trapezium

WAEC 2021