It is because last time they had no place value.... It was not made up then
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Ah, let's take a moment to appreciate the beauty in both Hindu-Arabic and ancient Egyptian numerals. While Hindu-Arabic numerals use a place-value system with symbols like 1, 2, 3, etc., ancient Egyptian numerals relied on hieroglyphs and a base 10 system. Despite their differences, both systems share the common goal of helping us understand and communicate numbers, showing the wonderful diversity of human creativity and ingenuity.
The main difference between the Egyptian numerical system and the Hindu-Arabic system is the characters. While in Hindu-Arabic the symbols 0, 1, 2, 3, 4, 5, 6, 7, 8 and, 9 are used the Egyptians used a character for each 1, 10, 100, 1000, 10,000, 100,000, and 1,000,000. (the numerals are visible here https://secure.wikimedia.org/wikipedia/en/wiki/Egyptian_numerals) With Hindu-Arabic each place is populated by only one character and that represents that places value but in Egyptian each character is repeated for the desired value of each place. 234 is 234 in Hindu-Arabic but in Egyptian it is 2 100 characters, 3 10 characters, then 4 1 characters.
No. Egyptians did not invent numbers. Numbers used for counting were first used tens of thousands of years ago, before written history and thus before there are known civilizations. As for base or place number systems, the Myans are believed to be the first to create such a number system. It was base 60. Then the Egyptians invented a 10 base number system.
India did not invent the number system. Indian mathematicians introduced the concept of zero. This was a key development that led to our number system which is based on place-values.