HANS WOYDA MATHEMATICS QUIZ COMPETITION 1999/2000

SECTION 3 - MENTAL ARITHMETIC AND PROBABILITY (INDIVIDUAL) Marks: 2 or 1 to opponent. Time: 60 seconds. Questions 1 and 2 are to be done mentally. Year. 7-9 1) Find the sum of the integers from 10 to 20 (inclusive). 2) Find how many zeros there are at the end of the product of all the integers from 10 to 20 (inclusive) ................
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