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Can you always find the least common multiple of 2 numbers by multiplying them together?
Wiki User
∙ 12y ago
No, that will not always work.
in the case for some numbers it will work.
for example 3 * 4 = 12. it works here.
however
if you do that for
30 and 20, you will get 600.
the real lowest common multiple is 60.
so it does not always work.
Wiki User
∙ 12y ago
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Can you always find the LCM for two numbers by muiltiplying them together?
No, this will find a common multiple, but not always the least. For example, 2 and 4 have a least common multiple of 4 but if you multiply them you get 8. In fact, the LCM will only be the product of two numbers if the numbers have no common factors. We call numbers with no common factors relatively prime.
What does negative 5 in parantheses to the 2nd power equal and can you explain what it would mean without the parantheses is it the same thing?
(-5)2 = 25. This is because multiplying two negative numbers together always leads to a positive number. Think about it like taking a negative amount of negative numbers, which switches them over to positive numbers. -52 = -25, because you are not multiplying negative 5 by negative 5, you are multiplying 5 by 5, and then multiplying that value by negative 1.
Do always need to regroup when you are multiplying digit or digit numbers?
No. It depends on how good you are at arithmetic.
When a number is doubled it is always even why?
When you double any number you are in-fact multiplying it by 2 which is an even number. All even numbers are multiples of 2. When a number is doubled, it is multiplied by 2 and so the result is always a multiple of 2. Thus it must always be an even number.
When you multiply an odd number by an odd number is the answer always odd?
Yes - while multiplying odd numbers by even numbers will always produce an even result.
Is it true you can always find a common multiple of a pair of numbers by multiplying them together?
No you can't, but sometimes you can.
Can you always find the least common multiple of two numbers by multiplying them together.why or why not?
You can always find a common multiple of two numbers by multiplying them together; it will not always be the least common multiple. As one counterexample, if one of the numbers is a multiple of the other, the first number is the LCM of the two. 9 x 3 = 27 The LCM of 9 and 3 is 9. 4 x 6 = 24 The LCM of 4 and 6 is 12.
Can you always find the LCM for two numbers by multiplying them Why or why not?
This does not work when one of the numbers is negative.
Do 2 prime numbers always add together to make a multiple of 2?
Only if they are odd.
What if there is no LCM in a fraction problem?
There is always going to be a LCM. Just multiply the two numbers together to get the a common multiple if you cant find one because the two numbers multiplied together is a common multiple.
What do you do to find the LCM when there is no multiple the same?
For any non-zero whole numbers, there are ALWAYS multiples that are the same. That's the whole point in finding the least common multiple! For example, simply by multiplying the two numbers, you get a common multiple. However, there is no guarantee that it will be the LEAST common multiple. On the other hand, writing down lots of multiples and looking for common multiples is not very efficient, except perhaps for very low numbers. A better method is to factor each of the numbers into prime factors, then use any prime factor that appears in one or more of the numbers for your result. Use the highest power. For example, if one number has a factor of 2 to the power 3, and the other has 2 to the power 2, use 2 to the power 3. Multiplying all those prime factors together gives you the least common multiple.
What is the product of a negitave number and a positive number?
The product of two numbers is the two numbers multiplied together. When multiplying a positive number and a negative number, the answer is always negative. For example: 7*-3= -21
What is the common multiple of 49.95 and 39?
Common multiples include any multiple of 4655.
Can you always find the LCM for two numbers by muiltiplying them together?
No, this will find a common multiple, but not always the least. For example, 2 and 4 have a least common multiple of 4 but if you multiply them you get 8. In fact, the LCM will only be the product of two numbers if the numbers have no common factors. We call numbers with no common factors relatively prime.
Do two natural numbers always have a least common multiple?
Yes, two natural numbers always have a least common multiple.
Can you always determine the LCM of any 2 numbers and why simple?
For any two positive integers x and y, an LCM exists. If it exists, we can identify it.
What are the common multiples of four and seven?
28, 56, 84 you can always find a common multiple of two numbers by multiplying them (but that won't always be the least common multiple)... the other common multiples can b found by multiplying that number with any other positive integer... for example, if you have two numbers (a and b), then one of their common multiples is a x b (but not always the smallest one), and the others are 2 x a x b, or any other positive integer times a x b
