Maths — Foundation, Unit 2

Functions (Edexcel IGCSE Maths): Exam Questions

3 questions · 12 marks · ≈ 12 min

Guided practice

15 marksmedium

1 mark

(a)

Here is a number machine.

Flowchart with an input processed through three steps: multiply by 5, subtract 7, and divide by 2, leading to an output.

Work out the output when the input is 15

Your answer

2 marks

(b)

Work out the input when the output is 124

Your answer

2 marks

(c)

The input is $p$ . The output is $T$

Write down a formula for $T$ in terms of $p$ .

Your answer

How did you do?/ 5

23 marksmedium

1 mark

(a)

Here is a number machine.

Flowchart showing a process: input multiplied by 10, resulting value increased by 6, leading to output.

Work out the output when the input is 14

Your answer

2 marks

(b)

Here is a different number machine

Flowchart with two processes: first multiplies input by a number, second adds 9, resulting in the output. Arrows indicate progression.

When the input is 11 the output is 64

Write a number on the dotted line to complete the number machine.

Your answer

How did you do?/ 3

34 marksmedium

2 marks

(a)

Here is a number machine.

Flowchart diagram showing input processed through multiplication by y, then subtraction of 17, leading to output.

When the input is 7 the output is 60

Work out the value of $y$

Your answer

2 marks

(b)

Here is a different number machine.

Flowchart diagram showing a process where input is increased by 7, then divided by 5, leading to the output.

The input is $x$

Write down an expression, in terms of $x$ , for the output.

Your answer

How did you do?/ 4