Calculate this mentally and improve your thinking power.
Katy wrote all the numbers from 200 to 300 on a piece of paper.
How many times did she write the digit 2?
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The number of times 2 will appear in hundreds place: (200 to 299) is 100
The number of times 2 will appear in tens place: (220 to 229) is 10
The number of times 2 will appear in units place: (202, 212, 222 ….292) is 10
So she will write the digit 2 120 times.