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What is dividible into 8 evenly?
Any of its factors which are 1, 2, 4 and 8
What numbers is dividible by 4 124 330 3048 678 982 1432?
4, 124, 3048 and 1432 are all divisible by 4.
Which number is not dividible by 2 or 5?
You can divide anything by 2 or 5 but it may go into decimals
Are the numbers divisible by 5 also divisible by 10?
Any number that ends in '5' or '0' is divisible by '5'. Any number that ends in '0' is divisible by '10'. Hence 100,000 is dividible by both '5' and '10' . The repective answer are 20,000 and 10,000. A number such as 1,000,005 is only divisible by '5'. Hence the answer is 200,001
Give a proof that square root of n is irrational for every natural number n that is not a perfect square?
Let's suppose the opposite and say that it is rational, so we can write it as a fraction of two natural numbers, where m 1:l/mLet's chose l and m in the way that the fraction l/m will be reduced, i.e, l and m have no common divider.So, according to the supposed, (l/m)2 = nFrom here, l2 = nm2Now we see that l should be dividible by m. But we've chosen l and m in such a way that it couldn't be. Contradiction.So we cannot represent the square of n as a rational fracture.
