IGCSE Online Assessment Revision (Y10)

Solve these simultaneous equations.

5x - 2y = 17

2x + y = 5

• x = -3, y = -1

• x = 3, y = -1

• x = -3, y = 1

• x = 3, y = 1

Answer explanation

You can use Substitution or Elimination method.

Tags

algebra

simultaneous linear equations

5, 13, 21, 29, .........

Write down the nth term of the sequence.

• 8n - 3

• n + 8

• 8n

• 5 + 3n

Answer explanation

Remember the formula to form general term:

a + (n - 1)d

where

a = first term

d = common difference

Tags

algebra

number patterns & sequences

arithmetic progression

Calculate 324 × 17.

Give your answer in standard form, correct to 3 significant figures.

Tags

standard form

significant figures

Indira measures the length, l centimetres, of her desk as 95.6 cm, correct to the nearest millimetre.

Complete the statement about the value of l.

• 95.55 ⩽ l < 95.65

• 95.1 ⩽ l < 96.1

• 9555 ⩽ l < 9565

• 955 ⩽ l < 965

Answer explanation

Remember to calculate the absolute error.

Beware of the units, centimetres and millimetres.

Tags

absolute errors

limit of accuracy

Answer explanation

Use HCF division method to factorise completely.

Answer explanation

take note of this:

-(a + b) = -a - b

Bernard invests $480 at a rate of 4.5% per year compound interest.

Calculate the amount he receives at the end of 3 years.

• $544.80

• $547.75

• $547.76

• $64.80

These two flags are mathematically similar.

Calculate the height, h, of the second flag.

• 5.4 m

• 3 m

• 3.6 m

• 1.6 m

Answer explanation

For similar figures, ratio of the corresponding lengths are EQUAL.

Diego changes 200 euros into Argentine Peso.

The exchange rate is 1 euro = 24.8 pesos.

Work out how many pesos he received.

• 8.06 euros

• 8.06 pesos

• 4960 euros

• 4960 pesos