Maths Unit 2 - Higher

Calculate 84% of 67, giving your answer to correct to 3 significant figures.

A newspaper claimed that its circulation had increased from 3 560 000 to

3 755 800. What percentage increase is this?

Wood pulp is used to make paper.

In 2017, Brazil used 14 million tons of wood pulp.

 

In each of the next 3 years, Brazil’s production of wood pulp increased by 1.7% of the previous year’s production.

After 2020, it is expected that the production of wood pulp will increase by 2% of each previous year’s production.

                                                                                   

What quantity of wood pulp would you expect Brazil to produce in 2022?

In 2020, the average amount of paper used per person in China was 74 kg, and in the USA it was 228 kg.

Insert a value correct to 2 significant figures, in the following statement.

 

In 2020, on average, each person in the USA used ____________ times as much paper as each person in China.

A number is decreased by 12% of its value.

This is done three times, each time decreasing the previous number by 12%

Circle the multiplier that you would use to find the value after 3 decreases

• x0.36

Calculate the reciprocal of -47. Giving your answer to 4 significant figures.

The HCF of 30 and 75 is the square root of a number.

What is the number?

When a number is reduced by 15%, the answer is 6154.

What is the original number?

Using the quadratic formula solve

3x² – 2x – 2 = 0, give your answer to 2 decimal places

(only give the positive value of x)