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To find all common multiples of two numbers, you first need to split them into their prime factors:
21 = 3x7
14 = 2x7
The next step is to identify any common factors. In this case, both numbers have 7 as a factor so we can discard one 7. Take every other prime factor (2, 3 and 7) and multiply them together to get the LCM:
2x3x7=42
To find any other common multiple, you simply multiply this number by an integer (2,3,4...). By doing this, you find that the first few numbers that 21 and 14 both go into are:
42, 84, 126, 168...
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What number can both go into 21 and 14?
7
What can go into 14 and 21 evenly?
The number 7
What does 21 go into 299?
14, remainder 5
What prime number can go into 42?
Numbers that can go into 42 are 1, 2, 3, 6, 7, 14, 21, and 42.
What is the range for 14 9 11 21 7?
14. If you have the numbers in order like so: 7,9,11,14,21 you can see that 21 is the greater number. You then subtract 21 from the smallest number, 7, and you get 14.
How many times does 21 go into 308?
308 ÷ 21 = 14 with remainder 14
What number goes into 14 and 21?
7
What number is in the middle of 14 and 28?
21
What number is halfway between 7 and 21?
The answer is 1414
How can 21 go into 14?
21 divided by 14 equals 1 with a remainder of 7.
The sum of what number and 14 is equal to 21?
The answer is 7. The equation is x+14=21, so you would find x by doing 21-14=7 x=7
Find the three arithmetic means between 21 and 14?
Any number between 21 and 14 can be an arithmetic mean.
