1
No.A number a is divisible by another number b, if and only if the fraction a/b is equivalent to a whole number. And as you know, 1/2 = 0.5, which is not a whole number, hence is 1 not divisible by 2.The only number 1 is divisible by, is 1 itself. All numbers are divisible by 1.
30 is divisible by, and is the least common multiple of, 2, 3, and 5.
90
2520
1
No it is not. A prime number is only divisible by 1 and itself, whereas 784 is at least divisible by the number 2 as well. 784/2=392
2
Yes. Every number is divisible by itself or 1.
620 is not prime. 620 is divisible by at least 2. By definition prime numbers are only divisible by 1 and themselves.
No.A number a is divisible by another number b, if and only if the fraction a/b is equivalent to a whole number. And as you know, 1/2 = 0.5, which is not a whole number, hence is 1 not divisible by 2.The only number 1 is divisible by, is 1 itself. All numbers are divisible by 1.
1, 2, 4, 7, 14, 28
30 is divisible by, and is the least common multiple of, 2, 3, and 5.
18
90
2520
The least number divisible by 2, 3, 4, 5, 6, 9, and 10 is 180.