Oh, what a happy little question! Let's take a moment to appreciate the multiples of 3 less than 20. We have 3, 6, 9, 12, and 15. Just like painting a beautiful landscape, these numbers all work together in harmony to create a lovely pattern. Keep exploring numbers, my friend, and let your imagination run wild with possibilities!
1, 2, 3, 4
The multiples of 4 with products equal or less than 20 are: 1 x 4 = 4 2 x 4 = 8 3 x 4 = 12 4 x 4 = 16 5 x 4 = 20
81, 84, 87.
3,6,9,12,15,18,21,24,27
15, 30 and 45
1, 2, 3, 4
Three of them.
6, 12, 18
The multiples of 4 with products equal or less than 20 are: 1 x 4 = 4 2 x 4 = 8 3 x 4 = 12 4 x 4 = 16 5 x 4 = 20
3. All other multiples of 3 are not prime.
33
To find numbers that are multiples of both 3 and 5, we need to find the numbers that are common multiples of both 3 and 5. These are numbers that are divisible by the least common multiple of 3 and 5, which is 15. The first four numbers less than 70 that are multiples of both 3 and 5 are 15, 30, 45, and 60.
Here are all 13 of them: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195
3,6,9,12,15,18,21,24,27
81,84,87,90
There are 3 such numbers: 30, 60, 90.
3, 9, and 15. 6 and 18 are also multiples of 3, but are even.