Lesson: Challenging Arithmetic - 11
Factors and Multiples of Numbers
[Page 11 of 30]
How many positive integers less than 100 are multiples of both 4 and 6?
4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, and 96 are multiples of 4 less than 100.
6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72, 78, 84, 90, and 96 are multiples of 6 less than 100
12, 24, 36, 48, 60, 72, 84, and 96 are common in both sets, hence; there are 8 common multiples of both 4 and 6 less than 100.
Video Lesson - What are Multiples of Numbers
How many positive integers less than 100 are multiples of both 16 and 14?
14, 28, 42, 56, 70, 84, 98 are multiples of 14 and 16, 32, 48, 64, 80, 96 are multiples of 16.
There is no common multiple in both sets. So, the answer is 0.
Countinue
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