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Question 754933: How to find square root of a 6 digit number in an easy way?
Answer by josgarithmetic(39620)   (Show Source):
You can put this solution on YOUR website! How advanced is your course or class? The best is to know the common rules about factoring. Knowing if a number is prime or not is tricky after the first hundred natural numbers. If the 6digit number is odd, look in a table of prime numbers. If it's not there, then some factorization will be possible.
Remember the rules for 2, 3, 5, 9, 10. After those, start checking about prime factors.
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