Q. A lady's age is between 50 to 70.each of her sons has many sons as his brothers.the sum of the sons and grandsons in the lady's age.what is her age?

• n--no of sons
  each son has n-1 brothers
  no of grandsons= n(n-1)
  n+n(n-1)=n^2 and perfect square between 50,70 is 64
• 11 years agoHelpfull: Yes(44) No(5)
• let lady's has n sons then no. of grandsons=n*n=n^2
  lady's age=X= sum of the sons and grandsons=(n+n^2)=n(n+1)
  if n=6,X=42
  if n=7,X=56
  if n=8,X=72
  only condn is true n=7,X=56 (x=lady's age is between 50 to 70)
  x=56
  
• 11 years agoHelpfull: Yes(13) No(24)
• which answer is correct????
• 10 years agoHelpfull: Yes(2) No(0)
• x ->no of brother
  
• 11 years agoHelpfull: Yes(0) No(9)