Answer:
73
Step-by-step explanation:
Some students might try to guess groups of numbers, which could take a while. Look at another strategy to solve the problem: Set up an equation for each number. Use "x" to represent the first number. Since you know they are consecutive numbers, the next number would be x + 1 and then the final number is x + 2. Set up an equation, then solve it as follows.
x + (x + 1) + (x + 2) = 213
3x + 3 = 213
3x = 210
x = 70
So the first number is 70. That means that the three numbers are 70, 71 and 72.
