HOW TO TURN YOUR CALCULATOR INTO BASIC TIMER

Calculator could be tricked and converted into timer without and physical hack in it. You need not to open the calculator to make it. Just an observed trick which could just make a calculator work like a timer. But it just displays reverse counting. No alarm or sound tone could be seen with is trick.

Just these features must be required for this trick in the calculator-
1) Auto replay system (button, must be there)
2)check and correct system (if required)


Decide how much time do you need like 10 sec-
then start ading in calculator like this-
10+9+8+7+6+5+4+3+2+1+0
then get the ans
after this just press the auto replay button.

there we go, the timer is on!!!!!!!!!!!!