The sum of the ages of five children born at intervals of three years each is 50 years. What is the
age
of the middle child

• x+x+3+x+6+x+9+x+12=50
  5x=30
  x=4
  x+6=10 Years
• 10 years agoHelpfull: Yes(0) No(0)
• Let the age of first child be x
  and according to condition ,there is an interval of 3 years each
  and sum of ages of 5 child is 50 years
  so
  x+(x+3)+(x+6)+(x+9)+(x+12)=50
  5x+30=50
  x=4
  so age of first child will be 4
  second will be 7
  third 10
  fourth 13
  fifth 16
  
  so the age of middle child will be 10 years
• 10 years agoHelpfull: Yes(0) No(0)
• Let the age of first child be x.so the equation will become x+x+3+x+6+x+9+x+12=50.on solving the equation x will become 4.so the middle age will be 10years.
• 9 years agoHelpfull: Yes(0) No(0)
• Middle child age is 52
  sum of ages=x+x+3+x+6+x+9+x+12/5=50
  5x+30=250+x=46
  middle child age x+6=46+6=52
• 9 years agoHelpfull: Yes(0) No(3)
• let smallest child be (x-6) years old
  hence,
  (x-6)+(x-3)+x+(x+3)+(x+6)=50
  hence,
  5x=60,
  x=12.
  hence middle child x= 12 yrs old !
• 9 years agoHelpfull: Yes(0) No(1)
• a+b+c+d+e=50
  b=6a,c=9a,d=12a,e=15a
  let a=3a
  3a+6a+9a+12a+15a= 50
  45a=50
  a=1.11
  c=9a
  c=9×1.1=9.9
• 7 years agoHelpfull: Yes(0) No(0)