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Is The counting numbers are also known as the natural numbers?
yes! just think of it this way: when someone tells you start counting, you "naturally" start with 1, 2, 3, 4, 5,...and so on. that's helps you remember the words natural numbers, because you "naturally" start counting at 1. it's the same with counting numbers. if someone told you to start counting, you would start with 1, 2, 3, 4, 5,...and so on. this helps you remember counting numbers, because you start "counting" with 1. get it??! =D
How many known prime numbers are there?
There are infinite prime numbers as there is infinite numbers. You cannot limit the counting of primes.
What is the set of numbers that includes the natural numbers their opposites and 0?
These are known as integers.
What are the negative Fibonacci numbers called?
The negative Fibonacci numbers (also known as the Negafibonacci numbers) consist of the Fibonacci numbers in an alternating negative and positive pattern.The start of the Negafibonacci sequence runs thus:1, -1, 2, -3, 5, -8, 13, -21...And continues in a pattern identical to the Fibonacci numbers but with alternating negative and positive numbers.
What do you call multiples that are shared by two or more numbers?
Those are known as "common multiples". The smallest POSITIVE of these common multiples is called the "least common multiple".
