9
99
The long but fool-proof way is to find the complete prime factorisation of the number. Then group all the factors into pairs, rejecting any that cannot be paired. The product of the numbers that are left is the largest square factor.
A factor that is a square number. 16 is a square factor of 32.
The largest factor of any number is the number itself.
The largest perfect square factor of 48 is 16.
9 is a square number and is a factor of 63
We need to know what number the square is a factor of.
It is: 36 because 6*6 = 36
Well, isn't that just a happy little question! The largest square factor of 20 is 4. You see, 4 times 4 equals 16, which is the largest square number that can evenly divide into 20. Just imagine that 4 fitting perfectly into 20, creating a beautiful harmony of numbers on your canvas.
49
4
36
36
It is: 49
36
25