# Brainteasers

Puzzles to test mathematical skills, set by Anita Straker. Solutions below More brainteasers on www.tes.co.ukteacherbrainteasers

24-hour clock

Clues across:

1. 22 minutes past one am

5. Half past eight in the evening

6. Six minutes to 3pm

7. One minute before 7pm Clues down:

1. Eleven minutespast 2am

2. Twelve minutes before 11am

3. 5 minutes before midnight

4. 11 minutes before 9pm

Threesomes

Using the same digit exactly three times, make two expressions to give the answer 24. For example, using three 2s we can get:

22 + 2 = 24

Now do it for the digits 1,3,4,5,6,7,8 and 9.

You can use the signs +, - , x, V, integers or decimals, powers or roots, and factorials.

Remember that: factorial 4 is written as 4! and means 4 x 3 x 2 x 1 = 24; and point four recurring is written as .* 4 and equals four ninths.

It only takes a moment and you'll get access to more news, plus courses, jobs and teaching resources tailored to you

## Latest stories

• ### Detention for kissing teeth 'risks racial harassment'

Catherine Lough
18 October 2019
• ### Tes Podcast: middle leaders and teacher presenteeism

Dave Speck
18 October 2019
• ### Exclusive: DfE to bring baseline assessment in-house

Amy Gibbons
18 October 2019
• ### How to survive 25 years as a head

Claudia Civinini
18 October 2019
• ### Free schools fail to reach the 'left-behind' areas

Bobbie Mills
18 October 2019
• ### Gavin Williamson to address AoC Annual Conference

Tes Reporter
18 October 2019
• ### Fake news? How to teach the 'information crisis'

Ken Crow
18 October 2019
• ### Wellbeing: Get outside, no matter what the weather

Jo Steer
18 October 2019
• ### David Lammy: 'We have to pump money into education'

David Lammy
18 October 2019
• ### Tes FE Podcast: Monitoring visits and Colleges Week

Kate Parker
18 October 2019