Is 700 a prime or composite number?

Answer 1

Just by looking at it, without trying any factors to see if they work, you can tell that 700 is

-- divisible by 10, because it ends with a zero

-- divisible by 5, because 5 is a factor of 10,

-- divisible by 2, because 2 is a factor of 10, and also because 700 is an even number

-- divisible by 100, because it ends with two zeroes

-- divisible by 20, 25, and 50, because they're all factors of 100

-- divisible by 7, because 700 is seven hundreds

With so many things that jump out at you as soon as you glance at 700, you can be pretty sure that
it has at least one other factor besides '1' and itself, so it can't be a Prime number.

Answer 2

700 is a composite number, because it can be divided by 2,4,5,7,10,20,25,50, and 100.