If y is an integer, then the least possible value of |21 - 5y| is
Pick: A) 2 B) 1 C) 3 D) 4 E) 5
We know that 5y is a multiple of 5, so let’s first look at the multiples of 5 closest to 22. We have “20” and “25”. Let’s subtract both of these from 21 and see which one produces the smallest result. When 5y = 20, y is 4 and when 5y = 25, y is 5. Let’s start with letting y = 4.   |21-5(4)|   |21-20|   |1| = 1   Next, let’s let y equal 5.   |21-5(5)|   |21-25|   |-4| =4   We see that the smallest possible value of |21-5y| is 1.   Answer 1.
<result>B</result>
If y is an integer, then the least possible value of |21 - 5y| is