Brainteasers

13th January 2006 at 00:00
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.

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