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Pentagon Ring

11 to 14

Weekly Problem 47 - 2011
Place equal, regular pentagons together to form a ring. How many pentagons will be needed?

problem

Three of a Kind

11 to 14

How long is it between 5:55 and the next time all three digits on a digital clock are the same?

problem

Decimal Clock

11 to 14

A decimal clock is started at midnight. What time would it show at 6 o'clock in the morning?

problem

Bucket of Water

11 to 14

Lisa's bucket weighs 21 kg when full of water. After she pours out half the water it weighs 12 kg. What is the weight of the empty bucket?

problem

Television Transition

11 to 16

Weekly Problem 15 - 2006
What is the relationship between the width of wide screen and traditional televisions if the area of the two screens is the same?

problem

Angle of Overlap

11 to 14

Weekly Problem 26 - 2007
The diagram shows two equilateral triangles. What is the value of x?

problem

Square Sum

14 to 16

One of these numbers is the largest of nine consecutive positive integers whose sum is a perfect square. Which one is it?

problem

Monetary Difference

14 to 16

Al, Bertie, Chris and Di have sums of money totalling £150... What is the difference between the amount Al and Di have?

problem

Many Matildas

11 to 14

MatildaMatildaMatil... What is the 1000th letter?

problem

Extended Parallelogram

11 to 14

Weekly Problem 11 - 2014
The diagram shows a parallelogram and an isosceles triangle. What is the size of angle TQR?

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Pentagon Ring

Three of a Kind

Decimal Clock

Bucket of Water

Television Transition

Angle of Overlap

Square Sum

Monetary Difference

Many Matildas

Extended Parallelogram