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How many times does digit 5 appear from 1 to 100?

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1 से 100 तक की गिनती में अंक 5 कितनी बार आता है?
How many times does digit 5 appear from 1 to 100?

Options / विकल्प:

(a) 21
(b) 22
(c) 20
(d) 19


Solution / समाधान

We need to count how many times the digit 5 appears in the numbers from 1 to 100.

हमें 1 से 100 तक की संख्याओं में अंक 5 के आने की कुल संख्या ज्ञात करनी है।

Step 1: Ones Place / इकाई स्थान

Numbers ending in 5:

5, 15, 25, 35, 45, 55, 65, 75, 85, 95

10 occurrences

Step 2: Tens Place / दहाई स्थान

Numbers from 50 to 59:

50, 51, 52, 53, 54, 55, 56, 57, 58, 59

10 occurrences

Step 3: Double Count Check / दोहरी गणना की जाँच

In 55, the digit 5 appears twice (once in tens place and once in ones place), and both occurrences are counted separately, which is correct.

So,

Total occurrences = 10 + 10 = 20


Answer / उत्तर

(c) 20

Digit 5 appears 20 times from 1 to 100.
1 से 100 तक की गिनती में अंक 5 कुल 20 बार आता है।


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