5 rectangles means 5 prime numbers in this number
64 = 25 = 64 x 1 = 32 x 2 = 16 x 4 = 8 x 8 : 4 rectangles
96 =24 x 3 = 32 x 3 = 16 x 6 = 8 x 12 = 4 x 24 = 2 x 48 = 1 x 96 : 6 rectangles
72 = 23 x 32 = 72 x1 = 36 x 2 = 18 x 4 = 9 x 8 = 3 x 24 : 5 rectangles!
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There are an infinite number of prime factorizations with exactly three factors. Without something more specific, we won't be able to narrow it down.
The number that has exactly 15 factors is 28. To determine the number of factors a number has, you can prime factorize the number and then add 1 to each exponent in the prime factorization and multiply these numbers together. In the case of 28, the prime factorization is 2^2 * 7^1, so the number of factors is (2+1) * (1+1) = 3 * 2 = 6. To have exactly 15 factors, the number needs to be a square of a prime number, so 28 = 2^2 * 7^1 fits this criteria.
30
== Will you please answer my question?! Will you please answer my question?! == In number theory ( http://www.answers.com/topic/number-theory ), integer factorization is the process of breaking down a composite number ( http://www.answers.com/topic/composite-number ) into smaller non-trivial integers ( http://www.answers.com/topic/divisor-2 ), which when multiplied together equal the original integer. Source:integer-factorization== The prime factors of a positive integer are the prime numbers that divide into that integer exactly, without leaving a remainder.The process of finding these numbers is called integer factorization, or prime factorization. Source:http://en.wikipedia.org/wiki/Prime_factor
No single integer satisfies both requests. 80 is the only integer with exactly 5 factor pairs in that range, but it has two prime factors. 64 and 81 have one prime factor but 4 and 3 factor pairs respectively.
rectangles
80
It is a triagular prism
It's very easy for two rectangles to have the same area and different perimeters,or the same perimeter and different areas. In either case, it would be obvious toyou when you see them that there's something different about them, and theywould not fit one on top of the other.But if two rectangles have the same area and the same perimeter, then to look at themyou'd swear that they're the same rectangle, and one could be laid down on the otherand fit exactly.
a cuboid a rectangular prism
They have two pairs of sides that are parallel. Trapeziums have exactly one pair of sides that are parallel.
A parallelogram does not have to be a rectangle, but since a parallelogram but have 2 sets of parallel sides, it often is. However, rectangles are always parallelograms. I hope this helps, didint exactly understand the question.
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Algeria, Angola, Burkina, Haiti, Indonesia, Liechtenstein, Malta, Monaco, Poland, San Marino, Singapore and Ukraine have flags with exactly two rectangles which are congruent. There are also many flags with more than two rectangles.