# Brainteasers

19th September 2003 at 01:00
Puzzles to test mathematical skills. Set by Anita Straker.

Solutions on page 31. More brainteasers on www.tes.co.ukteacherbrainteasers Police patrol

Age 7-11

A police car has to patrol some one way streets.

How many different routes can it take from A to B?

How many from A to C?

And how many from D to E?

Number crunching

Age 11-15

Put brackets in this statement to make it true.

3 + 4 - 5 - 3 - 1 - 5 = 12 Find three different ways to do it.

Now make this statement true by inserting suitable brackets and choosing values for a and b from the three numbers 3, 4 and 5.

a + b x a + b + a x b = 122

Brainteaser solutions from page 30

Police patrol

There are 3 different routes from A to B, and 4 different routes from A to C

There are 9 different routes from D to E.

Number crunching

3 + (4 - 5)(-3 - 1 - 5) = 12

3 + 4 - 5 - (3 - 1)(-5) = 12

3 + 4 - (5 - 3 - 1)(-5) = 12

a + (b x (a + b + a) x b) = 122, when a = 5, b = 3

### Subscribe to get access to the content on this page.

If you are already a Tes/ Tes Scotland subscriber please log in with your username or email address to get full access to our back issues, CPD library and membership plus page.

Not a subscriber? Find out more about our subscription offers.
Subscribe now
Existing subscriber?
Enter subscription number

## The guide by your side – ensuring you are always up to date with the latest in education.

Get Tes magazine online and delivered to your door. Stay up to date with the latest research, teacher innovation and insight, plus classroom tips and techniques with a Tes magazine subscription.
With a Tes magazine subscription you get exclusive access to our CPD library. Including our New Teachers’ special for NQTS, Ed Tech, How to Get a Job, Trip Planner, Ed Biz Special and all Tes back issues.

Subscribe now