Wiki User
∙ 5y ago121
Wiki User
∙ 5y ago81
225 = (15)2 2*2*5=20 3 digits in 225
It can have up to 5 digits.
81
Every square of a 4 digit number has more than four digits.
81
1
225 = (15)2 2*2*5=20 3 digits in 225
121 because 2x1x1=2 and 11x11=121
It can have up to 5 digits.
81
Six.
49
Every square of a 4 digit number has more than four digits.
You had me until "product." The product of 4 digits can't be prime.
81...........
362x(3x6)