Numbers with an odd number of factors

We saw in the session that:

Prime numbers only have two factors {1 and itself}

eg

2 has {1,2}

3 has {1, 3}

5 has {1, 5}

Some numbers have an odd number of factors:

1 only has one factor {1}

4 has {1, 2, 4}

9 has three factors {1, 3, 9}

Can you find any other numbers with an odd number of factors?

What do these numbers have in common?

The 7 x table

Mathtutor - preparing for AS level

Mathtutor are a series of on-line video tutorials, diagnostic tests and summaries dealing with all aspects of the A-level maths course.

A good start, if you want to do AS Maths, is to take a look at the algebra section and work through that. It can be found here.

Mathwords - an online maths dictionary

Ratio and proportion

Share £400 in the ratio of 3:5

Ratios

Trial and improvement

Have a go at solving this by trial and improvement before watching the solution
x^3 - 3x = 20
(x cubed)

Suggestions for Edexcel calculator paper

Revision Suggestions For Calculator Paper 2009

View more Microsoft Excel documents from sbishop2.

Earth hour 2009: 28th March 8.30 pm

Standard form

Download this worksheet and answer the questions as you watch this video here - about 15 mins long.

Other Maths 4 Real programmes can be found here:
http://www.teachers.tv/maths4real

Higher tier only: Tangent ratio; Cumulative frequency; Quadratics; Sine ratio
Foundation: all the rest!