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Earn +20 ptsQ: How many numbers between 2 and 20 are perfect squares?
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How many numbers which are less than 1000 have an odd number of factors?
Perfect squares have an odd number of factors. There are 31 perfect squares less than 1000.
How many prime numbers have squares between 100 and 300?
There are two prime numbers with squares between 100 and 300. These prime numbers are 11 and 13. (112 = 121 and 132 = 169.)
How many even integers have squares between 37 and 621?
Nine of them.
How many numbers are there between 80 and 180?
Infinitely many. there are infinitely many numbers between any two numbers.
How many perfect square nmbers are less than 1617 and greatr than 5929?
Take the square root of 1617 and round it up. Take the square root of 5929 and round it down. That gives you the lower and upper range of the numbers which you must square to get the desired perfect squares.
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