One grandfather has three grandchildren, two of their age difference is 3, eldest child age is 3 times youngest child’s age and eldest child’s age is two times of sum of other two children. What is the age of eldest child?
(a) 5 (8) 10 (c) 8 (d) 15

• One Grandfather has 3 grandchildren
  a, b, & c
  :
  the difference between two children was 3 years.
  b - c = 3
  b = (c+3)
  :
  Her eldest grandchild was 3 times the youngest one
  a = 3c
  :
  and the elder one 2 years more than the sum of the other two.
  a = b + c + 2
  replace b with (c+3); replace a with 3c
  
  3c = (c+3)+ c + 2
  3c = 2c + 5
  3c - 2c = 5
  c = 5 yrs is the youngest
  then
  a = 3(5)
  a = 15 yrs is the eldest
• 9 years agoHelpfull: Yes(2) No(0)