April 2003, All Stages

Problems

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Domino Sequences

Stage: 1 Challenge Level: Challenge Level:1

Find the next two dominoes in these sequences.

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Take the Right Angle

Stage: 2 Challenge Level: Challenge Level:1

How many times in twelve hours do the hands of a clock form a right angle? Use the interactivity to check your answers.

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The Mathemagician's Seven Spells

Stage: 2 Challenge Level: Challenge Level:1

"Tell me the next two numbers in each of these seven minor spells", chanted the Mathemagician, "And the great spell will crumble away!" Can you help Anna and David break the spell?

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Ten Green Bottles

Stage: 2 Challenge Level: Challenge Level:1

Do you know the rhyme about ten green bottles hanging on a wall? If the first bottle fell at ten past five and the others fell down at 5 minute intervals, what time would the last bottle fall down?

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Slow Coach

Stage: 2 Challenge Level: Challenge Level:2 Challenge Level:2

How many of this company's coaches travelling in the opposite direction does the 10 am coach from Alphaton pass before reaching Betaville?

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Light Blue - Dark Blue

Stage: 2 Challenge Level: Challenge Level:2 Challenge Level:2

Investigate the successive areas of light blue in these diagrams.

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Squares, Squares and More Squares

Stage: 3 Challenge Level: Challenge Level:1

Can you dissect a square into: 4, 7, 10, 13... other squares? 6, 9, 12, 15... other squares? 8, 11, 14... other squares?

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Sissa's Reward

Stage: 3 Challenge Level: Challenge Level:2 Challenge Level:2

According to an old Indian myth, Sissa ben Dahir was a courtier for a king. The king decided to reward Sissa for his dedication and Sissa asked for one grain of rice to be put on the first square. . . .

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Squaring the Circle and Circling the Square

Stage: 4 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

If you continue the pattern, can you predict what each of the following areas will be? Try to explain your prediction.

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The Root of the Problem

Stage: 4 and 5 Challenge Level: Challenge Level:2 Challenge Level:2

Find the sum of the series.

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Staircase

Stage: 5 Challenge Level: Challenge Level:1

Solving the equation x^3 = 3 is easy but what about solving equations with a 'staircase' of powers?

Elsewhere...