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Calculation 2000

11 to 14

Weekly Problem 49 - 2013
What is the value of 2000 + 1999 × 2000?

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Added Power

14 to 16

How many integers $n$ are there for which $n$ and $n^3+3$ are both prime?

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Percentage Swap

14 to 16

What is 50% of 2007 plus 2007% of 50?

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Shepherd's Flock

14 to 16

Does Joseph have too many sheep in his flock...

Small pepper seedlings in turquoise pots.

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Stellar Angles

11 to 14

Weekly Problem 30 - 2013
What is the angle $x$ in the star shape shown?

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Making Shapes

5 to 7

Arrange any number of counters from these 18 on the grid to make a rectangle. What numbers of counters make rectangles? How many different rectangles can you make with each number of counters?

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Favourite

Parabolic Patterns

14 to 18

The illustration shows the graphs of fifteen functions. Two of them have equations $y=x^2$ and $y=-(x-4)^2$. Find the equations of all the other graphs.