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Going Round in Circles printable worksheet
Charlie said: "It's Monday today, so it will be Monday again in $7$ days..
and in $770$ days...
and in $140$ days...
and in $35 035$ days...
and in $14 000 000 007$ days!"
Alison said: "and it will be Wednesday in $2$ days...
and in $72$ days...
and in $702$ days...
and in $779$ days...
and in $14 777 002$ days!"
Do you agree with all of Charlie's and Alison's statements?
Charlie and Alison chose numbers that were easy to work with. Can you see why they were chosen?
Can you make up some similar statements of your own?
If today is Monday, what day will it be in $1000$ days' time?
Once you've had a go, have a look at how two students got started on this question:
Ann's Method:
Luke's Method:
Can you suggest any other methods for solving the problem?
Now try to suggest efficient methods to answer the following questions.
How would you work them out in your head?
What would you do if you had pencil and paper?
How would your method change if you had a calculator?
Investigate how you can work out what day of the week your birthday will be on next year, and the year after...
Can you guarantee that, for any three numbers you choose, the product of their differences will always be an even number?
Explain why the arithmetic sequence 1, 14, 27, 40, ... contains many terms of the form 222...2 where only the digit 2 appears.