A certain street has 1000 buildings. A sign-maker is contracted to number the houses from 1 to 1000.
How many zeroes will be needed?
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Qn #2021
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Qn #1854
If all digits 6 in the numbers from 1 to 100 are replaced by 9,
by how much does the algebraic sum change?
Qn #1467
Qn #1357
If all the 6's are replaced by 9's, then the algebraic sum of all the numbers from 1 to 100 (both inclusive)
Qn #581
Among the given numbers below, the smallest number which will be divided by 9, 10,
15 and 20, leaves the remainders 4, 5, 10, and 15, respectively
Qn #405
Qn #119
Qn #114