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Counting numbers go on forever — you can always add one more.

Counting numbers go on forever — you can always add one more.

No matter how big a number is, you can always say a bigger one by adding one. There is no biggest counting number!

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The Romans had no symbol for zero. The Romans had no symbol for zero. A 'googol' is a 1 followed by one hundred zeros. A 'googol' is a 1 followed by one hundred zeros. A “googol” is the number 1 followed by 100 zeros. A “googol” is the number 1 followed by 100 zeros. Numbers help us tell how many things there are. Numbers help us tell how many things there are. Zero is the only number that can't be written with Roman numerals. Zero is the only number that can't be written with Roman numerals.