Weegy: All the prime numbers are:3, 11, 23, 31
User: Indicate whether the number is divisible by 2, by 3, or by 5. (Note: Some numbers may be divisible by more than one of these numbers.)
a. 450
b. 31
c. 18,652
d. 455
Weegy: A.) 450 is divisible by 2 (with 225), 3 (with 150), and 5 (with 90) B.) 31 is not divisible by any number because it is a prime number C.) 18,652 is divisible by 2 (with 9,326) only D.) 455 is divisible by 5 (with 91) only.
User: Write out the prime factor of the following numbers.
a. 15
b. 21
c. 38
d. 42
Weegy: 15 = 3 * 5; 21 = 3 * 7; 38 = 2 * 19; 42 = 2 * 3 * 7. The prime factors of 15 are 3 and 5. The prime factors of 21 are 3 and 7. The prime factors of 38 are 2 and 19. The prime factors of 42 are 2, 3 and 7.
User: What’s the least common multiple of each group of numbers?
a. 5 and 6
b. 2 and 9
c. 6 and 8
d. 2, 5, and 6
(More)