Let's denote the number of students in Jack's math class as \( x \).
Jack started with 65 lollipops and gave 4 lollipops to each student, which totals to \( 4x \) lollipops. After giving away the lollipops, he had 1 left.
So we can set up the equation:
\[ 65 - 4x = 1 \]
Now, we can solve for \( x \):
- Subtract 1 from both sides:
\[ 65 - 1 = 4x \] \[ 64 = 4x \]
- Divide both sides by 4:
\[ x = \frac{64}{4} \] \[ x = 16 \]
Thus, there are 16 students in Jack's math class.