Math Revision 3

Write the ratio 18 : 30 in its simplest form.

Answer explanation

18 : 30

Divide both numbers by 2

9 : 15

Now divide both numbers by 3

3 : 5

Using the formula v = u + at, find value of v.

Given that u = 50m a = 9.8 and t = 2.

Answer explanation

v = u + at

= 50 + (9.8)(2)

=69.6

Which is the correct formula to find the side BC?

• 
• a²+b²=c²

Answer explanation

Since we know 2 sides, we can use a²+b²=c²

The diagram shows a net diagram of a ______

Write the ratio 16 : 12 in its simplest form.

Answer explanation

16 : 12

Divide both numbers by 4

4 : 3

Which pairs of angles are alternate angles?

• a and b

• b and c

• e and f

• c and d

Answer explanation

Alternate angles form the 'Z' shape.

Find the area of rectangle.

Answer explanation

Area of rectangle

= L x B

= 8 x 5

= 40 cm²

Name the corresponding angle that pairs with angle c.

The first four terms in a sequence is

7 11 15 19

Find the next number in the sequence.

Answer explanation

Add 4 to get the next number.

Eg 7 + 4 =11

So 19 + 4 =23

Write 1.2 x 10^-2 as an ordinary number.

Answer explanation

Move the decimal to the left.