Out of all the measurements used in the calculation, find the one with the least number of significant digits. This will be the limiting factor of how many significant digits the answer should have.
All five digits in the number are significant.
By adding whatever you mean with "integers of a number".
999999
There are actually three valid answers: 17, 53, and 71 All are prime and all have digits adding to 8.
The sum of all the digits of all the positive integers that are less than 100 is 4,950.
Add together all the digits in the odd positions in the number. Sum = A Add together all the digits in the even positions in the number. Sum = B If A-B is 0 or if it divisible by 11 (positive or negative), then the original number is divisible by 11.
6 is the first number that's divisible by any one of those digits, or all three.
Out of all the measurements used in the calculation, find the one with the least number of significant digits. This will be the limiting factor of how many significant digits the answer should have.
All five digits in the number are significant.
1234567
1000000
By adding whatever you mean with "integers of a number".
1111111111
999999
All four of the digits given are significant digits.
Numbers above 99 and under 1000 are 3-digits, all 900 of them.