Question

how many times does the digit 7 occurs if we write all the numbers from 1 to 200​

Answer 1

Answer:

From 1 to 100 the digit 7 occurs 10 times

In the numbers 7, 17, 27, 37, 47, 57, 67, 77, 87, 97.

So we get to know that from 1 to 100 , the digit 7 occurs 10 times

So from 1 to 200 the digit 7 occurs 10 x 2 = 20 times

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