Write the number 0.000 086 23 in standard form.

The table shows some information about the dress sizes of 25 women.

Find the median dress size.

The box plot shows information about the distribution of the amounts of money spent by some male students on their holidays.

Work out the interquartile range for the amounts of money spent by these male students.

Jeff is choosing a shrub and a rose tree for his garden.

At the garden centre there are 17 different types of shrubs and some rose trees.

Jeff says,

"There are 215 different ways to choose one shrub and one rose tree."

Could Jeff be correct?

The table shows the probabilities that a biased dice will land on 2, on 3, on 4, on 5 and on 6.

Neymar rolls the biased dice 200 times.

Work out an estimate for the total number of times the dice will land on 1 or on 3.

On Saturday, some adults and some children were in a theatre.

The ratio of the number of adults to the number of children was 5 : 2.

Each person had a seat in the Circle or had a seat in the Stalls.

3/4 of the children had seats in the Stalls.

117 children had seats in the Circle.

There are exactly 2600 seats in the Circle.

On this Saturday, were there people on more than 60% of the seats?

Owen and Wasim play for the school football team.

The probability that Owen will score a goal in the next is 0.4.

The probability that Wasim will score a goal in the next is 0.25.

Mr Slater,

"The probability that both will score a goal in the next match is 0.4 + 0.25"

Is Mr Slater right?

What is 100^0.5?

In London, 1 litre of petrol costs 108.9p.

In New York, 1 US gallon of petrol costs $2.83.

1 US gallon = 3.785 litres

£1 = $1.46

In which city is petrol better value for money?