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900, 810, 801, 720, 711, 702, 630, 621, 612, 603, 540, 531, 522, 513, 504, 450, 441, 432, 423, 414, 405, 360, 351, 342, 333, 324, 315, 306, 270, 261, 252, 243, 234, 225, 216, 207, 180, 171, 162, 153, 144, 135, 126, 117 and 108.
NOTE : These numbers have digits whose sum is 9. An interesting mathematical fact is that they are also all divisible by 9.
This applies to any number. If the sum of the digits = 9 or a multiple of 9 then the number is divisible by 9.
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What is the four digit number whose digits are reversed when multiplied by nine?
Find a four digit number whose digits will be reversed when multiplied by nine?
What is the greatest three digit number whose digits have a sum of twelve?
Nine hundred thirty (930) is the highest three digit number whose digits have a sum of 12. 9+3+0=12. Any numbers higher than that will give you an sum greater than 12.
A three digit number whose digits add up to 900?
Three digits can't possibly add up to 900. The largest possible sum of 3 digits is (9 + 9 + 9) = 27.
What is the smallest 4 digit number whose digits add up to 18?
22
What is the units digit of the least whole number greater than 1000 whose digits are all different?
What is the units digit of the least whole number greater than 1000 whose digits are all different?
