Denise L. answered 01/17/19
Engaging Tutor with over 20+ Years of Helping Students Succeed
Hi Marissa,
If your first number is "N", since they are consecutive, the next number is "N+1" and the one after that is "N+2"...these three add up to 21, so N + (N+1) + (N+2) = 21 so now you can solve for N, which is the least or smallest one:)