David is paid £34000 per year. He is going to get a 3% increase in the amount of money he is paid.

Select the correct calculation to work out how much money David will be paid per year after the increase. (2)

Gary buys a dress in a sale. The normal price of the dress is reduced by 20%. The normal price is £36.80.

Work out the sale price of the dress. (2)

Karen buys a pack of 8 bottles of water. The pack costs £1.25. Karen sells all 8 bottles of water for 50p each.

Work out Karen’s percentage profit. (3)

A shop decreases all its prices by 10%. A week later the shop increases all prices by 10%.

What is the overall change? (3)

Simplify 7a – 6b + 5a + 4b (1)

Expand 4(2m - 3p) (1)

Expand -2w(3w²y - 5y) (2)

Multiply 8a³bc² x 3ab³c (2)

Expand and simplify

n(n − 4) − n(5 − n) (2)

A triangle has base 3a. Its area is  $\frac{3}{8}$  $a^2$ .
Calculate its height. (2)