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Find the mean of the squares of the first ten counting numbers?
38.5
In 80 coins one coin is counterfeit what is minimum number of weightings to find out counterfeit coin?
4 weighting
How much is a 24 karat half-dollar sized coin worth?
What does it say on it? Most modern bullion coins will give the weight of the gold in the coin in troy ounces on the coin somewhere. If your coin has that, it is rather easy to find your coin's value, just simply find the value of gold in troy ounces that day and figure out how much your coin is worth from that. If your coin doesn't have a weight listed, it should have identifiable characteristics such as the year, design, country of origin, and other ways to identify your coin. Without knowing the details about your coin it is impossible to truly answer your question.
If counting to 100 how many 6s will you find?
Oh, what a delightful question! If you're counting to 100, you will find the number 6 appearing 20 times. Each multiple of 10 (10, 20, 30, and so on) has a 6 in it, as well as the numbers 60 to 69. Remember, every number is special and brings its own joy to the canvas of mathematics.
How do you find multiples of a number?
Multiply the number by another number and the product is the multiple
