Re: A problem to solve
Posted: Mon Dec 21, 2015 4:19 pm
19,20,21 is answer
19,20,21BdMO Online Forum
The Official Online Forum of BdMO
https://matholympiad.org.bd/forum/
A problem to solve
Page 2 of 2
Re: A problem to solve
Posted: Sun Mar 14, 2021 10:30 pm
19,20,21Re: A problem to solve
Posted: Fri Oct 01, 2021 3:13 pm
The solution is pretty simple
They are three consecutive numbers.
Let the first number be X
Second number = X + 1
Third number = X + 2
Sum of three consecutive numbers = 60
X + X + 1 + X + 2 = 60
3 X + 3 = 60
3 X = 57
X = 19
X + 1 = 19 + 1 = 20
X + 2 = 19 + 2 = 21
19 + 20 + 21 = 60
The three consecutive numbers are 19, 20 and 21.
They are three consecutive numbers.
Let the first number be X
Second number = X + 1
Third number = X + 2
Sum of three consecutive numbers = 60
X + X + 1 + X + 2 = 60
3 X + 3 = 60
3 X = 57
X = 19
X + 1 = 19 + 1 = 20
X + 2 = 19 + 2 = 21
19 + 20 + 21 = 60
The three consecutive numbers are 19, 20 and 21.