Points X, Y and Z are located in the same horizontal plane such that Y is 12 km north of X and Z is on a bearing of 270° from X. If |XZ| = 6km, calculate, correct to one decimal place, lYZl

The ratio of the number of men to the number of women in a 20 member committee is 3:1. How many women must be added to the 20-member committee so as to make the ratio of men to women 3:2?

If (x + 3) varies directly as y and x = 3 when y = 12, what is the value of x when y = 8?

Find the nth term of the sequence 4, 10, 16 ,...