Question

If you want to type first 1000 natural numbers on your computer how many times you have to press no keys

Answer 1

Solution :-

we have to write first 1000 natural Numbers.

→ 1 to 9 = 9 digits

Now,

→ 10 to 99 = There are 90 = 2-digit numbers

So,

→ 90 * 2 = 180 digits

Now,

→ 100 to 999 = There are 900 = 3-digit numbers

So,

→ 900 * 3 = 2700 digits

And, in Last ,

→ 1000 = 4 digits

Therefore,

→ Total digits Required = 9 + 180 + 2700 + 4 = 2893 Digits. (Ans.)

Hence, to type first 1000 natural numbers on your computer we have to press 2893 keys..