A five-digit perfect square in the form of 5abc6 has a thousands digit a, hundreds digit b, and tens digit c. If a is less than or equal to b and b is less than or equal to c, what is the sum a+b+c ?
A)9 or 19
B)8 or 20
C)7 or 21
D)6 or 22

• a 5 digit no starting with 5 .. so the smallest five digit would be 50000. square root of 50000 is 223.606 so obviously 224 will have its square value nearer to it.
  224 square is 50176 .. 0+1+7 = 8. Also 236 square is 55696. 5+6+9=20
• 12 years agoHelpfull: Yes(2) No(0)
• B) 8 or 20.
  
  Such numbers are,
  
  50176(Square of 224) = 0+1+7 = 8
  55696(Square of 236) = 5+6+9 = 20
• 12 years agoHelpfull: Yes(1) No(0)
• option b
  8 or 20
• 12 years agoHelpfull: Yes(0) No(0)