Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
1) Suff... numbers evenly spaced from 0 on both sides will cancel out.
2) Insuff ... e.g. -5,-2,1,4,7 are evenly spaced (by 3). And -6,-3,0,3,6 are also evenly spaced by 3. Sum in both cases is different. _________________