They are: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95.
123456789
70 and 75
5 and 10
To find prime numbers less than 100, the sieve of eratosthenes filters out 1 and all multiples of 2, 3, 5, and 7. All remaining numbers less than 100 are primes.
5, 10, 15, 20
Nine.
The multiples of 5 that are also multiples of 6 are multiples of their LCM. The LCM of 5 and 6 is 30, so the question becomes which multiples of 30 are less than 100? The solution is the numbers: 30, 60, 90
what are the multiples of 5
70 and 75
Yes: 18, 36, 54, 72, 90.
The LCM of two consecutive numbers is their product. The LCM of two consecutive multiples of 5 is their product divided by 5. Two consecutive numbers cannot be multiples of 5.
4 numbers less than 70 that are multiples of 3 and 5
55, 60, 65
5 and 10
18, 36, 54, 72, 90
To find prime numbers less than 100, the sieve of eratosthenes filters out 1 and all multiples of 2, 3, 5, and 7. All remaining numbers less than 100 are primes.
17, 34, 51, 68, 85, basically up to 17 x 5
Leaving out non-positive multiples, the answer is 5, 10, 15 and 20.