If numbers are written from 101 to 200, then how many times 1 is written ?

118
120
121
119

The correct answer is (a) 118.

There are 100 numbers from 101 to 200. In each of the numbers from 101 to 199, the digit 1 appears once. In the number 200, the digit 1 appears twice. Therefore, the digit 1 appears a total of 100 + 1 – 1 = 118 times.

Option (b) is incorrect because it counts the digit 1 twice in the number 200. Option (c) is incorrect because it counts the digit 1 three times in the number 200. Option (d) is incorrect because it counts the digit 1 four times in the number 200.

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