06/03/2013 - Four 4s (10-19) (**)

This puzzle is rated 2 star (medium).

Description

During this puzzle you can only use the following mathematical functions:

• Addition
• Subtraction
• Multiplication
• Division
• Decimal point
• Square-root
• Brackets
• Power (e.g. 4 to the power 4 is 4 x 4 x 4 x 4 = 256)
• The number of 4 exactlyf 4 times.
  

Puzzle
Using only the mathematical functions and the number 4 (EXACTLY 4 times) construct the numbers from 10 to 19.

Check the solutions page for the correct answer.

05/03/2013 - Adding It Wrong! (**)

This puzzle is rated 2 star (medium).

Description

This is an additional table that seems to follow a different pattern.

Puzzle
Work out the missing number.

Check the solutions page for the correct answer.

04/03/2013 - How Much? (**)

This puzzle is rated 2 star (medium).

Description

Brian was about to pay £12 for a number of cakes, but then the baker decided two throw two extra ones in for free, because they were so little.

By adding the two extra cakes the cakes now cost one pound a dozen less than when Brian was about to pay.

Puzzle 
Tell now how many eggs she received for her twelve cents?

Check the solutions page for the correct answer.

03/03/2013 - Weighing the Baby (***)

This puzzle is rated 3 star (hard).

Description

A the mother weighs 100 pounds more than the combined weight of the baby and the dog, and the dog weighs 60 percent less than the baby?

Puzzle
How much does the baby weigh?

Check the solutions page for the correct answer.

02/03/2013 - Missing Numbers 2 (**)

This puzzle is rated 2 star (medium).

Description

This is just a straight algebra questions, but there is an easier way to work it out.

X72 + 3Y8 = 47Z


Puzzle
Work out X, Y and Z.

Check the solutions page for the correct answer.