Welcome to Mathnasium’s Math Tricks series. Today we are determining whether a number is divisible by 7.
Welcome to Mathnasium’s Math Tricks, series. Today we are determining whether a number can be divided by a power of 2.
Welcome to Mathnasium’s Math Tricks series. Today we are sharing a trick to find a quarter of any number.
A number is divisible by 9 if the sum of the digits is divisible by 9. To determine if the number 738 is divisible by 9, we find the sum of its digits. Seven plus three plus eight gives us a final sum of eighteen. Eighteen is divisible by 9. So, 738 is di…
To find half of even numbers, sometimes it is useful to break apart the whole number into its parts. We can do this to find half of 26. Since 26 is composed of 2 tens and 6 ones, we can find half of 26 by finding half of 20 and half of 6. Half of 20 is 10…
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