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7. what is this: a squared + b squared = c squared
12. if jack buys 71 melons and eats 20 of them, how many are there
13. Click on the biggest number
15. which number is natural
17. what angle does a capital L have?
19. Convert to grams: 204 grams
20. how do you write 5.5 as a fraction?
21. anything multiplied by 1 is
22. What is the only natural number that is the same value when squared as it is when doubled?
23. Is pi rational or irrational