INTENSIVE REVISION PART 2 'O' LEVEL MATHS D 4024

The price of an electric drill is $78.

In a sale, the price is reduced by 15%.

Calculate the sale price.

The exchange rate between dollars ($) and euros (€) is $1 = €0.85.

Michael changes $100 to euros.

He buys a clock costing €58.99.

He changes the remaining money back to dollars.

Calculate the amount, in dollars, he has left.

Pietro invests $3500 in the Ace Simple account for 4 years.

Eliana invests $3500 in the Cool Compound account for 4 years.

At the end of the 4 years, who has more money in their account and by how much?

Simplify $4a-b+6b-7a$  

Solve $\frac{m}{2}-4=5$  

Rearrange $u=\frac{t+4}{3}$ to make   $t$  the subject

Expand $3y\left(2y^2+5\right)$  

a) Find the mode.

b) Calculate the mean.

c) One of these adults is chosen at random.

Find the probability that they received fewer than 4 emails that day.

Give your answer as a fraction in its simplest form.

A rectangular field measures 30 m by 45 m.

a) Calculate the perimeter.

b) Calculate the length of a diagonal.

The diagram shows a sketch of triangle PQR.

All lengths are given in centimetres.

Calculate the length a.