Question

Three consecutive natural numbers have a sum of 30. What is the least number?

Answer 1

consecutive numbers are 1 away from each other
they are
x,x+1,x+2

sum is 30
x+x+1+x+2=30
3x+3=30
minus 3 from both sides
3x=27
divide both sides by 3
x=9
x+1=10
x+2=11

the least number is 9