How many times the keys of a typewriter have to be pressed in order to write number from 121 to 1346?

Direction : What should come in place of the question (?) in the following question.

8424÷ 135 ×6=?

$$ {109.07\sqrt{?}}-{61\over 21.02} ×?=47.96\sqrt{?}$$

If the number 247_679 is completely divisible by 9, then the smallest whole number in the place of the blank digit will be 

Divide 32 into two parts such that the sum of the square of the parts is 674 what is the value of the parts? 

The fourth root of 24010000 is 

Which is the largest 3 digit number that is exactly divisible by 15, 25 and 30?

Direction : What should come in place of the question (?) in the following question.

$$ {2\over3}$$ of $${3\over4}$$of $${5\over8}$$ of 480=?