Example: 25134 is divisible by 2 as it ends with 4, moreover 2 + 5 + 1 + 3 + 4 = 15 is also divisible by 3 hence 25134 is divisible by 6. Divisibility by 7 Divisibility of a number by 7 is not that ...
It’s easy to tell if a given whole number is divisible by 2. Just check whether the last digit is even. There are also simple rules to determine whether a number is ...
The crisp new dollar bill that I have just taken from my wallet bears the serial number 24598176. It’s easy to tell that the number is exactly divisible by 2 but not by 5. Is it divisible by 3? by 4?
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