The number is 490.
I have two digits.I am between 16 and 24.I am one-quarter of a multiple of ten
20
It is not possible to give a sensible answer to this question. The least common multiple (LCM) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question!
One possibility is 11111222223333344444
37
between 630 and 700 miles per hour.
90 is one such number.
No. However, one you you can tell is that the digits of a multiple of 3 always add up to another multiple of 3.
Start with the smallest multiple of 13 and continue with the next smallest until finding one that fits the specifications. 13, sum of digits is 1 + 3 = 4 which is not prime 26, sum of digits is 2 + 6 = 8 which is not prime 39, sum of digits is 3 + 9 = 12 which is not prime 52, sum of digits is 5 + 2 = 7 which is prime So, 52 is the smallest positive multiple of 13 for which the sum of its digits is prime.
The one's digit can only be 5 or 0.
A single number cannot have a lowest common multiple because "common" refers to multiple that two or more numbers have in common. You have only one number.
You need at least two denominators to find something in common between them.