36.
The two smallest prime numbers are 2 and 3. So, the smallest number that is a product of two different primes that are squared is 22 x 32 = 36.
25 is the smallest two didgit squared number
The smallest prime factors are 2,3,5,7 thus the smallest number would be the product of these will be 210
30
n = 5 245 * 5 = 1225 which is 35 squared
jhuhuhu
If by "least number" you mean "smallest positive integer", then the answer is the product of the three smallest primes: 2x3x5 = 30
Logically, the smallest number with 4 different prime factors would have to be the product of the smallest four prime numbers. So the smallest natural number with four different prime factors is 210 (2*3*5*7).
A squared number is the product of an integer times itself. So, 16 is a squared number. 4 * 4 = 16.
1155, 3x5x7x11=1155.
5*n2
2×3×5×7=210