What is a digitool?

Why zero is not the smallest even number? Sin 15 plus cos 105 equals? How many meters are there in 9 kilometers? 1 billion means how many lacs? How much is 400 feet in 52.4 seconds? What does a red circle and two hands mean? Where is the center of the circle given by the equation x 4 squared y - 3 squared equals 4? Is the square root of 9 irrational? What is addends in mathematics? What statement about the characteristic of epics is least true? What does LiI mean? How many half steps are found in a perfect 5th? How do you find the volume in a cardboard that is 12 cm long 2 cm wide and 3 cm high? What is 8700000 in science notation? How many degrees is a 50 degrees triangle? Calculate the volume of a sphere where the radius is 9 meters? How do you calculate the percentage of a number between 2 other values like what is 3745 between 3000 and 4500? What is 100divided by 3? The sum of 3 consecutive integers is twice the first integer? What is greater ml or mg?