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What are the multiples for 8 and 16?
They are all the multiples of 16.They are all the multiples of 16.They are all the multiples of 16.They are all the multiples of 16.
What are all the multiples of 7 that are less then 50?
7, 14, 21, 28, 35, 42, 49
What generalization can you make about all multiples of 4?
All multiples of 4 are also multiples of 2. e.g. 15 x 4 = 60. (60 is a multiple of 2 and 4) All multiples of 4 are even numbers. e.g. 4, 8, 12, 16, 18, 20, 24, 28 etc (these numbers all end in either 0,2,4,6, or 8.
What are the non zero multiples of 28?
nothing
How many positive integers less than 2009 are divisible by 28 but not by 12?
To find the positive integers less than 2009 that are divisible by 28 but not by 12, we need to find the multiples of 28 that are not multiples of 12. The least common multiple of 28 and 12 is 84, so we need to find multiples of 28 that are not multiples of 84. Since 28 = 2^2 * 7 and 84 = 2^2 * 3 * 7, the multiples of 28 that are not multiples of 84 are those that have an odd power of 2. The highest multiple of 28 less than 2009 that satisfies this condition is 1976. Therefore, there are 1976 / 28 = 71 positive integers less than 2009 that are divisible by 28 but not by 12.
