A square has an area of 81 cm2 Find the perimeter of the square.

In a sale, the normal price of a boat is reduced by 15%. The sale price of the boat is £272 000. Work out the normal price of the boat.

Jim thinks of a number. 2/3 of Jim's number is 48. Work out 5/6 of Jim's number.

The diagram shows a right-angled triangle and a quarter circle. The right-angled triangle ABC has angle ABC = 90° The quarter circle has centre C and radius CB. Work out the area of the quarter circle. Give your answer correct to 3 sf

There are men and women at a meeting. There are 28 women. 30% of the people at the meeting are men. Work out the total number of people at the meeting.

A stadium cost £600 million. 13/15 of this cost was for the building. The rest of the cost was for the land. Work out the cost of the land.

Here are the first five terms of a number sequence. 45 40 35 30 25. A term of this sequence is −5 . Which term?

Mary needs to work out the size of angle x in this diagram. She writes x = 63° because base angles of an isosceles triangle are equal. Mary is wrong. Explain why.

The table shows information about the heights of 80 plants. Find the class interval that contains the median.

Find the lowest common multiple (LCM) of 40 and 56

Cups are sold in packs and in boxes. There are 12 cups in each pack. There are 18 cups in each box. Alison buys p packs of cups and b boxes of cups. Write down an expression, in terms of p and b, for the total number of cups Alison buys.

Write the ratio 4.5 : 2.25 in the form n : 1

The size of the largest angle in a triangle is 4 times the size of the smallest angle. The other angle is 27° less than the largest angle. Work out, in degrees, the size of each angle in the triangle. You must show your working.