Rounding test questions - National 5 Maths Revision

1

On board a ship the game of snooker is played with coloured discs instead of balls in case the sea is rough.

The volume of the disc is 37.9cm³.

If the disc has a radius of 2.5cm, calculate the height of it. Round your answer to 1 d.p.

Diagram of a cylinder with a radius of 2.5cm and a height of 'h' cm

3.8cm

1.9cm

4.7cm

2

A bread bin is in the shape of a prism.

The cross section of the bread bin consists of a rectangle 22cm by 12cm and a right-angled triangle.

Calculate the volume of the bread bin. Give your answer correct to 2 s.f.

Diagram of a bread bin with values 12cm, 22cm, 22cm and 44cm

22000cm³

23000cm³

33000cm³

3

How many significant figures are there in the number 41.0?

3

2

1

4

Round 4499 correct to 1 significant figure.

5000

4000

4500

5

Round 0.000785 correct to 1 significant figure

0.0008

0.000700

0.0007

6

Round 0.049999 correct to 3 significant figures.

0.050

0.0499

0.0500

7

Round 3.141592653 to four significant figures.

3.141

3.1416

3.142

8

Round 3.141592653 to five significant figures.

3.1415

3.1416

3.14159

9

What is 0.060307 rounded to three significant figures?

0.060

0.0603

0.06031

10

What is 0.060307 rounded to four significant figures?

0.060

0.0603

0.06031