A typist starts to type the serial numbers of candidates in a list, upto 500. Minimum how many times does he need to press the keys of numerals only?
Question
Solution 1
To solve this problem, we need to consider the number of digits in each number from 1 to 500.
Numbers from 1 to 9: There are 9 numbers, each with 1 digit. So, 9 * 1 = 9 key presses.
Numbers from 10 to 99: There are 90 numbers, each with 2 digits. So, 90 * 2 = 180 key presses.
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