Raj wanted to type first 200 natural number how many times he has to press the key
Answers
Answered by
1
1 digit nums = 0-9 ,
2 digit nums = 10-99
3 digit nums = 100-200
Total = 9*1 +89*2 + 100*3
Total = 9 + 178 + 300
478 + 9
487 times
Anonymous:
ans : 490 times
Answered by
5
1 digit no 1 to 9 =9*1 = 9
2 dgt no 10 to 99 = 90*2 =180
3 dgt no 100 to 200 = 101*3=303
total = 9+180+303= 492
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