Book Maths Puzzle Numerical Ability

How many zeroes does 100^1* 99^2 *98^3* 97^4 ....... 2^{99} *1^{100} have?

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Book Other Question

How many zeroes does 100^1 99^2 98^3 97^4 cdots 2^{99} 1^{100} have? the third vertex of an equilateral triangle whose two vertices are (0,0),(3,sqrt(3)) is