What happens when you round these three-digit numbers to the nearest 100?
Can you spot the mistake in this video? How would you work out the answer to this calculation?
Use the interactivity to investigate what kinds of triangles can be drawn on peg boards with different numbers of pegs.
Take any prime number greater than 3 , square it and subtract one. Working on the building blocks will help you to explain what is special about your results.
Can you make doughnuts by matching these fractions, decimals and percentages?
How many integers $n$ are there for which $n$ and $n^3+3$ are both prime?
