how many times digit 2 comes in 1 to 100

how many times digit 2 comes in 1 to 100 How many times would digit 2 be written if you wrote down all the whole numbers from 1 to 100 Solution 2 In one s place 2 12 22 32 92 10times 2 In ten s place 20 21

In fact any digit is a 2 roughly one tenth of the time We say roughly because there are very common boundary conditions For example between 1 and 100 the 10 s digit We start by counting the number of times the digit 2 appears in the units place i e the ones place from 1 to 100 We can see that the digit 2 appears 10 times in this position i e 2 12

how many times digit 2 comes in 1 to 100

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how many times digit 2 comes in 1 to 100
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From 91 to 100 the digit 2 appears only once for 92 So the total number of times of repetition of 2 is 1 2 10 1 1 1 1 1 1 1 20 Hence the digit 2 appears in numbers First we need to identify all the numbers between 1 and 100 that contain the digit 2 These numbers are 2 12 20 21 22 23 24 25 26 27 28 29 32 42 52 62 72 82 92

This happens 10 times as well 20 21 22 23 24 25 26 27 28 29 However we have counted the number 22 twice so we need to subtract 1 from our total count Therefore the total How many times does the digit 2 occur between 1 and 100 ntrsolutions ntrsolutions composite mathematics class 6

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As a start we count how many numbers have a 2 as last digit x1 2 f1 n n 8 10 assuming the division truncates Some examples f1 1 0 f1 2 1 f1 12 2 f1 21 2 Count the number of 2s as digit in all numbers from 0 to n Examples Input 22 Output 6 Explanation Total 2s that appear as digit from 0 to 22 are 2 12 20 21 22 Input

If you prefix the numbers with 0 s so that they are all three digits you can ask the number of 2 s in the range 000 to 999 You should be able to convince yourself The rule is to split the number into ranges with equal numbers of digits so 1 999 becomes 1 9 10 99 100 999 and then for each segment you do high low length 1 10

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how many times digit 2 comes in 1 to 100 - This happens 10 times as well 20 21 22 23 24 25 26 27 28 29 However we have counted the number 22 twice so we need to subtract 1 from our total count Therefore the total