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When you factor a number into its primes 2 is a factor then you know that the last digit must be what?
Wiki User
∙ 10y ago
Even.
Wiki User
∙ 10y ago
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How do you know when 7 is a factor of a number?
Double the last digit, subtract it from the rest. If the result is divisible by 7, the whole number is divisible by 7.
How do you know if a number is a factor of 9?
I think you might mean "multiple." If the sum of a number's digits is a multiple of 9, the original number is as well. If you want to know how you know if a number is a factor of 9, memorize the numbers 1, 3 and 9.
How you know that 2 is a prime factor?
2 is a prime number because its only factors are one and itself. Since 2 is a prime number, if it is a factor of your number, it is a prime factor.
If you know a factor of a number an you find another factor explain?
When the first number can divide the second without remainder. The formal definition would be as follows: For integers x and y, x is a factor of y if there exists an integer n such that y = n*x
What is the difference between a coefficient and a factor?
well i would say that a factor is a number add to another number and it equal something but a coefficient is not really what i know but i think its something similar to a factor
How do you know when 7 is a factor of a number?
Double the last digit, subtract it from the rest. If the result is divisible by 7, the whole number is divisible by 7.
Jenny's number has three digits One digit is a prime number Another digit is a square number The other is digit is neither prime or square Her number is NOT divisable by three What is the grerate?
Single digit primes are 2, 3, 5, 7 Single digit squares are 1, 4, 9 Neither prime nor square are 0, 6, 8 None of that makes a difference if we can't figure out what a "grerate" is. I'll guess you want to know the greatest possible number given those conditions. That would be 985.
If you know a factor of a number can you find another factor explain?
Factors come in pairs. If you know one factor, divide it into the number. The answer will be another factor.
When dividing a 3 digit number. How do you know where the first digit will be in the quotient?
You look at the place value.
How do you know where the first digit will be in the quotient when dividing a 3 digit number?
In the highest place value.
How do you know if the number is a factor?
If it divides evenly into the original number with no remainder, it's a factor.
Your number has 7 tens its ones digit is 1 more than its tens digit what is your number?
So far, you know that your number has a seven in the tens column:7?The ones digit is one more than the tens digit, which is 7.7+1=8Your number is 78.
How do you know if a number is divsible by 5?
You know a number is divisible by five when its last digit has either a 5 or 0.
How tall are the primes in transformers?
I don't know an exact number but in TF Exiles Axer said that the Primes were 3 or 4 times the size of a normal bot, that's why he couldn't carry the Requiem Blaster.
What is a rule about relative primes for a pair of even numbers?
Relative primes are two numbers that do not share any common factors (apart from 1). If a number is even, we know it must be divisible by 2. Thus, if two numbers are even, they must both be divisible by 2 and have two as a factor. Therefore, you cannot have a pair of relative prime numbers that are both equal.
What is a whole factor?
a whole factor is a number that is whole, which is also a factor, nd incase u didnt know a factor is the number u use to divide a number
How do you know when a number has 6 as a factor?
First you add up all of the digit's, and then divide. If 6 fits in it, then 3 also fits in it, but not 9. (For ex. Is 6 a factor of 674. 6+7+4=17, 17/6=2.8. so no, 6 is not a factor of 674) If your number is even and divisible by three, it's divisible by 6.
