| 66257 | What is the sum of all 3 digit positive integers that can… | Medium | |
| 66284 | The digital sum of a number is the sum of its digits | Medium | |
| 66472 | 26 a2 +2b ___ 99 If a and b represent positive single… | Medium | |
| 66566 | If each of 3 digit code is formed of integers from 1… | Medium | |
| 66582 | The largest four digit number which is a perfect cube, is | Medium | |
| 66598 | When 15 is subtracted from a number, it reduces to seven-twelve of… | Medium | |
| 66819 | A popular website requires users to create a password consisting of the… | Medium | |
| 67204 | log3 N+log7 N what is 3 digit number N that will be… | Medium | |
| 67524 | How many times digit 5 is used while writing numbers from 1… | Medium | |
| 67590 | 1,235 1,253 1,325 | Medium | |
| 67663 | Given that p is a positive even integer with a positive units… | Medium | |
| 67932 | How many integers between 300 and 1200 are there such that their… | Medium | |
| 68003 | Q and R are two-digit positive integers that have the same digits… | Medium | |
| 68185 | What is the units digit of 2222^(333)*4444^(222) | Medium | |
| 68220 | Each digit 1 through 5 is used exactly once to create a… | Medium | |
| 68255 | How many 3 digit number contain number 4 | Medium | |
| 68296 | If each of 3 digit code is formed of integers from 1… | Medium | |
| 68637 | In a two-digit number, the digit in the unit’s place is four… | Medium | |
| 68824 | 22 a2 + 3b ____ 80 If a and b represent positive… | Medium | |
| 68832 | A “palindromic integer” is an integer that remains the same when its… | Medium | |
| 69022 | How many odd numbers are possible between 1 to 10000 | Medium | |
| 69063 | Each of the positive integers a, b, and c is a three-digit… | Medium | |
| 69149 | The sum of the digits of a two digit number is 9… | Medium | |
| 69156 | What is the thousandths digit in the decimal equivalent of 64/5000 | Medium | |
| 69239 | How many integers between 300 and 1000 are there such that their… | Medium | |
| 69246 | If n = 4^11 – 4, what is the units digit of… | Medium | |
| 69249 | x, a, z, and b are single digit positive integers | Medium | |
| 69384 | What are the last two digits of (301*402*503*604*646*547*449*349)^2 | Medium | |
| 69443 | How many integerskgreater than 100 and less than 800 are there such… | Medium | |
| 69496 | How many two-digit numbers satisfy this property.: The last digit (unit's digit)… | Medium | |
| 69567 | FOG + FOG + FOG + FOG = 1460 | Medium | |
| 69647 | What is the sum of all digits for the number 10^27 -… | Medium | |
| 69660 | If k is the sum of the digits of integer m, and… | Medium | |
| 69710 | In a three digit number, the hundred digit is 2 more than… | Medium | |
| 69777 | If the number 52,1n7, where n represents the tens digit, is a… | Medium | |
| 69837 | What two-digit number is less than the sum of the square of… | Medium | |
| 69866 | In a set of numbers from 100 to 400 inclusive, how many… | Medium | |
| 69873 | What is the units digit of 32 | Medium | |
| 69919 | What is the unit’s digit of 7^5 | Medium | |
| 70056 | If all of the telephone extensions in a certain company must be… | Medium | |
| 70197 | If a and b are positive integers and x = 7^a and… | Medium | |
| 70312 | The difference between a two-digit number and the number obtained by interchanging… | Medium | |
| 70333 | What is the units digit of 17^83 × 13^82 × 11^67 | Medium | |
| 70358 | A construction company wants to number new houses using digit plates only | Medium | |
| 70425 | How many 3-digit even numbers are possible such that if one of… | Medium | |
| 70570 | How many times digit 2 is used while writing numbers from 400… | Medium | |
| 70599 | How many integers between 263,205and 658,805 have tens digit 1 and units… | Medium | |
| 70700 | Find a two digit number, given that the sum of the digits… | Medium | |
| 70744 | K-numbers are positive integers with only 2's as their digits | Medium | |
| 70746 | The difference between a two-digit number and the number after interchanging the… | Medium | |