There are 179 multiples of 5 between 101 and 999.
101 ÷ 5 = 201/5 → first multiple of 5 ≥ 101 is 21 x 5
999 ÷ 5 = 1994/5 → last multiple of 5 ≤ 999 is 199 x 5
→ number of multiples of 5 between 101 and 999 is 199 - 21 + 1 = 179.
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To find numbers between 55 and 101 that are multiples of 3, 10, and 15, we need to find the numbers that are common multiples of these numbers within the given range. The common multiples of 3, 10, and 15 are numbers that are divisible by the least common multiple (LCM) of these numbers, which is 30. Therefore, the numbers between 55 and 101 that are multiples of 3, 10, and 15 are 60, 90, and any other multiples of 30 within that range.
80.
60 and 90
There are 33 multiples of 3 in the range. as first and last are both odd there must be 17 odd and 16 even. Also note that such numbers must be multiples of 6 and 16 x 6 = 96
There are 48.