SOLUTION: Each year on Colin’s birthday (since his first birthday), he celebrates with a birthday cake and the number of candles on the cake is always equal to his age. If he has had a total
Algebra.Com
Question 285783: Each year on Colin’s birthday (since his first birthday), he celebrates with a birthday cake and the number of candles on the cake is always equal to his age. If he has had a total of 253 candles on his birthday cakes, how old is he?
A.22 B. 20 C. 24 D. 19 E. None of these.
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
253=n*(n+1)/2
506=n*(n+1)
n=22
A. 22
1+2+3+4+ 19+20+21+22=253
RELATED QUESTIONS
Benson and Jenson are twins born one minute apart. Benson celebrates his 3rd birthday... (answered by FrankM)
Benson and Jenson are twins born one minute apart. Benson celebrates his 3rd birthday... (answered by addingup)
the total number of dollars you would have received if you had received 1 dollar on your... (answered by drcole)
Benson and Jenson are twins born one minute apart. Benson celebrates his 3rd birthday... (answered by fractalier)
the parents of a 9-year-old boy have agreed to deposit $10 in their son's bank account on (answered by addingup)
David gave 10 cents to his daughter on her first birthday. He decided to give her triple... (answered by mananth)
The total number of dollars you would have received if you had received 1 dollar on your... (answered by mucklef)
Gilberto opened a savings account for his daughter and deposited $1500 on the day she was (answered by Lapric)
A birthday cake is a cylinder with a radius of 10 inches and a height of 6 inches. What... (answered by Alan3354)