Because the square root isn't listed twice.
No. Squares and regular hexagons, both with an even number of sides, can make regular tessellations.
7 * * * * * What? 73 = 343 which is the square of 18.52... hardly a perfect square! The correct answer is 9.
The product of two odd numbers is always an odd number.
the product of two integers is odd if and only if the two factors are odd
One possible conjecture: The product is always an odd number. Another possible conjecture: The product is always greater than either of them. Another possible conjecture: Both odd numbers are always factors of the product. Another possible conjecture: The product is never a multiple of ' 2 '. Another possible conjecture: The product is always a real, rational number. Another possible conjecture: The product is always an integer.
Perfect squares are numbers with an odd number of factors.
perfect squares
Perfect squares have an odd number of factors.
Only perfect squares can have an odd number of factors. The answer is 16. It has five factors: 1,2,4,8,16.
A perfect square has an odd number of factors. Factors of numbers always come in pairs -- except for perfect squares. Since the square root of a perfect square is listed only once on the list of factors, it results in a list with an odd number of factors.
Perfect squares have an odd number of factors. There are 31 perfect squares less than 1000.
Right angles an odd number of factors
Perfect squares have odd numbers of factors. The perfect squares less than 100 are: 1,4,9,16,25,36,49,64,81,100. 64 seems to fit both criteria.
Squares have an odd number of factors.
Because it's a square number. All perfect squares have an odd number of factors because they have one factor pair that is the same number twice (the square root) and when the factors are listed, the number is listed once.
A perfect square has an odd number of factors.
There are 9 integers less than 100 that have an odd number of factors.Every factor of a number has a pair, eg 2 & 3 are a factor pair of 6; and so it would be expected that every number has an even number of factors.However, if the factor pair of a number are the same number (eg 6 & 6 are a factor pair of 36), then there will be an odd number of factors.When there is a repeated factor like this, the number is a perfect square.Thus only perfect squares have an odd number of factors.Less than 100 there are 9 perfect squares (1, 4, 9, 16, 25, 36, 49, 64 & 81) which have an odd number of factors.100 itself is a perfect square and also has an odd number of factors, but the question asked for those numbers less than 100 with an odd number of factors.