The highest common factor of 21 and 50 is just 1
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Both 21 and 50 can be evenly divided into their least common multiple (LCM), which is 1050. This means that 1050 is the smallest number into which both 21 and 50 can fit without leaving a remainder. Additionally, any common multiple of 21 and 50 will also be divisible by both.
a number is divisible by 12 if the number is also divisible by both 3 and 7. You mean a number is divisible by 21 if it is divisible by 3 and 7.
How many numbers less than 700 are divisible by both 15 and 21?
21 numbers - if you include the 10 and the 50.
Odd multiples of 7 less than 50 are numbers that are both odd and divisible by 7, and are less than 50. The odd multiples of 7 less than 50 are 7, 21, and 35. These numbers are odd because they are not divisible by 2, and they are multiples of 7 because they can be divided evenly by 7.