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A number plus twice the number is equal to three times the number?
A + 2a = 3a
Draw algorithm and flowchart to check a number is perfct or not?
1. List all factors of number (including 1 and the number, list each factor only once even if it goes in multiple times) 2. Add up all the factors 3. If the sum is equal to twice the original number, then the original number is perfect, if not, it is not perfect.
What is the algebraic equation for a number plus twice the number is equal to three times the number?
n + 2n = 3n
Why does number 25 have a 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.
Why does 16 have an odd number of factors?
It's a square number. Square numbers have a factor pair that is the same number twice. When listed, that number occurs once.
What number between 20 and 30 has a sum of all its proper factors equal to twice the number itself?
There aren't any numbers like that. You might be thinking of 28, which has a sum of all its factors equal to twice itself, making it a perfect number. Proper factors are a different set.
What is the number called when all its factors add up to twice the number?
multiply
Why do perfect squares have an odd number of factors?
Because the square root isn't listed twice.
Translate the difference between twice a number and four time the sum of the number and seven is equal to two?
The difference between a number x and twice y is equal to fifteen.
How can you prove that a perfect number can never be a prime number?
In a perfect number, the sum of all the factors (including the number itself) is twice the number. E.g., the sum of the factors of 6 is 1 + 2 + 3 + 6 = 12 (equal to 2 x 6). Every prime number has two factors: 1, and itself. So, the sum of the factors is only one more than the prime number itself; for any number greater than 1, this can't be twice the number. For example, the prime number 7 has the factors 1 and 7, which add up to 8.
A number plus twice the number is equal to three times the number?
A + 2a = 3a
How Thrice a number divided by 4 is equal to twice a number?
Simple! The number is 0.
9 less than twice a number is equal to that number?
um, 9.
Twice a number decreased by 8 is equal to the number increased by 10. Find the number?
18
What two prime numbers equal 44?
To find the primes that equal a number, start with any factor pair of the number and keep factoring the composite factors until all factors are prime. 44 2 x 22 2 x 2 x 11 = 44 The two prime numbers that equal 44 are 2 (twice) and 11.
What is the probability of rolling the sum of 12 with 2 dice?
Since you need a specific number - the number 6 - twice, the probability is (1/6)2, which is equal to 1/36.Since you need a specific number - the number 6 - twice, the probability is (1/6)2, which is equal to 1/36.Since you need a specific number - the number 6 - twice, the probability is (1/6)2, which is equal to 1/36.Since you need a specific number - the number 6 - twice, the probability is (1/6)2, which is equal to 1/36.
Why number 33 is perfect?
It is not. A perfect number is defined as a number that is equal to twice the sum of all of its factors (or equal to all of its factors, smaller than the number itself). Perfect numbers include 6 (factors 1, 2, 3, 6) and 28 (factors 1, 2, 4, 7, 14, 28). It is not known whether there are odd perfect numbers. - Unless somebody is using a different definition of "perfect" in this case; but when you talk about a "perfect number", the above definition is commonly used.
