Start with the number 537.
Add one-third of a dozen.
Double that number.
Round to the nearest ten.
Add the digits in your number. The sum of that is your new number.
Triple that number.
What is the number?
537 + (1/3 * 12) = 541
2 * 541 = 1082
1082 ≈ 1080
1 + 0 + 8 + 0 = 9
3 * 9 = 27
So the number is 27