Number Toolkit (Cambridge (CIE) O Level Maths): Exam Questions

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From the list, write down a number that is

i) a multiple of 3,

[1]

ii) a cube number,

[1]

iii) a prime number,

[1]

iv) an irrational number.

[1]

Explain why is irrational.

From the list, write down a number that is an irrational number.

1, 2, 3, 5 and 7 are all common factors of two numbers.

Write down the digit that the two numbers must end in.

Insert one pair of brackets to make this calculation correct.

Tom is tiling a wall.

He needs to buy at least 100 tiles.
The tiles are sold in large packs and small packs.

Work out the cheapest cost for Tom to buy the packs of tiles he needs.

£.............................

Tom is also tiling a floor.

The floor is a rectangle with length 600 cm and width 240 cm Each tile is a square with side 40 cm

Tom uses this method to work out the number of tiles he needs.

Give a reason why Tom’s method is wrong.