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1) There were 20 animals. One-fifth of them were dolphins, 1/10 of them were fish, 1/4 of them were whales and the rest were dogs. How many dolphins were there?
2) There were 20 animals. One-fifth of them were dolphins, 1/10 of them were fish, 1/4 of them were whales and the rest were dogs. How many fish were there?
3) There were 20 animals. One-fifth of them were dolphins, 1/10 of them were fish, 1/4 of them were whales and the rest were dogs. How many whales were there?
4) There were 20 books on the shelves about animals. One-half of the books were about puppies. One-tenth of the books were about frogs, and 1/5 were about dolphins and the rest were about whales. How many books were there about puppies?
5) There are 60 cookies in a box. One-sixth of the cookies were 6 chocolate chip. How many chocolate chip cookies are in the box?