Question

a new colony was built and the builder gave contact to a sign maker to number the buildings from number 1 to 500. how many zeroes will he had

Answer 1

Solution :-

From 10 to 100 
= 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100
= 11 zeros

From 101 to 110
= 101, 102, 103, 104, 105, 106, 107, 108, 109 and 110
= 10 zeros

From 120 to 200
= 120, 130, 140, 150, 160, 170, 180, 190 and 200
= 10 zeros

Similarly, From 201 to 210
= 10 zeros

From 220 to 300
= 10 zeros

From 301 to 310
= 10 zeros

From 320 to 400
= 10 zeros

From 401 to 410
= 10 zeros

From 420 to 500
= 10 zeros

Total number of zeros will be needed = 11 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 91 Zeros

So, 91 zeros will be required.

Answer.