+0

# Primes and Perfect Squares

0
724
1

A natural number greater than 1 is said to be prime if its only factors are 1 and itself. For example, the number 7 is prime since its only factors are 1 and 7. A perfect square is an integer created by multiplying an integer by itself. The number 25 is a perfect square since it is 5 × 5 or 5 Determine the smallest perfect square that has three different prime numbers as factors.

Jan 17, 2016

#1
+21842
+30

A natural number greater than 1 is said to be prime if its only factors are 1 and itself. For example, the number 7 is prime since its only factors are 1 and 7. A perfect square is an integer created by multiplying an integer by itself. The number 25 is a perfect square since it is 5 × 5 or 5 Determine the smallest perfect square that has three different prime numbers as factors.

$$(2 \cdot 3\cdot 5)^2 = 2^2\cdot 3^2\cdot 5^2 = 4\cdot 9\cdot 25 =\mathbf{ 900}$$

Jan 18, 2016

#1
+21842
+30
$$(2 \cdot 3\cdot 5)^2 = 2^2\cdot 3^2\cdot 5^2 = 4\cdot 9\cdot 25 =\mathbf{ 900}$$