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Which group of sets does the number -15 belong to?
To any set that contains it! It belongs to {-15}, or {sqrt(2), -15, pi, -3/7}, or all whole numbers between -43 and 53, or multiples of 5, or composite numbers, or integers, or rational numbers, or real numbers, or complex numbers, etc.
What is the number in between 15 and 15?
There cannot be any number between two identical numbers.
Is 225 a square number?
Yes. Any number that is the result of a whole number multiplied by itself is a square number. Since 15 squared (152) = 225, the square root of 225 is 15.
What are all the common multiples of 3 and 15?
There is an infinite number of common multiples for 3 and 15. A common multiple of any two or more numbers is any number into which each of two or more numbers can be divided evenly (zero remainder). However, the least or lowest common multiple (LCM) of 3 and 15 is 15.
What is 15 less than a number squared?
x² - 15
