Maths Challenges

Challenge 1

I am thinking of a number that is bigger than 2 but smaller than 12. What could it be?

If possible, post your answer to Seesaw.

Challenge 1

I am thinking of a number between 10 and 100 with a single 9 in it. What might my number be? How can you be sure that you have considered all possibilities?

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Challenge 1

How many numbers can you write using the digits 1, 2, 3 and 4? You can only use each digit once in each number. Can you work systematically to make sure that you have found every possibility?

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Challenge 1

What numbers can you make using 1, 2, 0, 7, 8 and 4?

What are the largest and smallest numbers that can be made?

How many in between? How can you be sure that you have found them all?

If possible, post your answer to Seesaw.