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problem

Favourite

Same Length Trains

5 to 7

How many trains can you make which are the same length as Matt's and Katie's, using rods that are identical?

problem

Favourite

Non-Transitive Dice

11 to 14

Alison and Charlie are playing a game. Charlie wants to go first so Alison lets him. Was that such a good idea?

problem

Four in a Row

11 to 14

Where should black play in this game of four-in-a-row to be certain of winning on her next move?

problem

Bisector Intersection

11 to 16

Weekly Problem 14 - 2007
In the triangle PQR, the angle QPR=40degrees and the internal bisectors of the angles at Q and R meet at S, as shown. What is the size of angle QSR?

problem

Digital Book

11 to 14

If it takes 852 digits to number all the pages of a book, what is the number of the last page?

problem

Old Order

11 to 14

Who is the youngest in this family?

problem

Honey Bees

14 to 16

How many bees could fly 1000 miles if they had 10 gallons of honey?

problem

Little Goldbach

11 to 14

How many of the numbers 1 to 20 are not the sum of two primes?

problem

Pied Piper

14 to 16

How many rats did the Pied Piper catch?

problem

Rational Integer

14 to 16

Weekly Problem 39 - 2012
For how many values of $n$ are both $n$ and $\frac{n+3}{n-1}$ integers?

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Same Length Trains

Non-Transitive Dice

Four in a Row

Bisector Intersection

Digital Book

Old Order

Honey Bees

Little Goldbach

Pied Piper

Rational Integer