| 48404 | A three-digit code for certain locks uses the digits 0, 1, 2… | Medium | |
| 48538 | Of the five-digit positive integers that have no digits equal to zero… | Medium | |
| 48599 | How many 4 digits number contain the number 2 | Medium | |
| 48671 | The letters D, G, I, I , and T can be used… | Medium | |
| 48697 | 82 a7 + 6b ____ 190 If a and b represent positive… | Medium | |
| 48749 | The unit digit in the product (784 x 618 x 917 x… | Medium | |
| 49055 | The difference between a two digit number and the number obtained by… | Medium | |
| 49106 | Employees of a certain company are each to receive a unique 10-digit… | Medium | |
| 49193 | s(n) is a n-digit number formed by attaching the first n perfect… | Medium | |
| 49282 | If a is a positive integer, and if the units digit of… | Medium | |
| 49493 | A five digit number is to be formed using each of the… | Medium | |
| 49520 | How many numbers greater than 1000 can be formed with the digits… | Medium | |
| 49587 | Units digit of 7^5^6^13 | Medium | |
| 49719 | A two digit number is 18 less than the square of the… | Medium | |
| 49721 | How many four digit numbers have no repeat digits, do not contain… | Medium | |
| 49991 | a printer number the page of a book starting with 1 and… | Medium | |
| 50007 | How many five digit numbers can be formed using the digits {1… | Medium | |
| 50258 | how many different digit number are there which have digit 1,2,3,4,5,6,7,8, such… | Medium | |
| 50352 | The difference between a two-digit number obtained by interchanging the positions of… | Medium | |
| 50383 | Numbers greater than 1000 but not greater than 4000 which can be… | Medium | |
| 50423 | What is the units digit of 17^83 × 13^52 × 11^87 | Medium | |
| 50460 | A palindrome is a word or a number that reads the same… | Medium | |
| 50467 | How many distinct four-digit numbers can be formed by the digits {1… | Medium | |
| 50533 | A “palindromic integer” is an integer that remains the same when its… | Medium | |
| 50621 | 4^5^6^7^8^9^10 find unit digit | Medium | |
| 50653 | A number consists of two digits whose sum is 11 | Medium | |
| 50671 | How many 5 digit ( digit = 0 - 9 ) zip… | Medium | |
| 50708 | What is the unit digit in (632)^179×(615)^316×(341)^476 | Medium | |
| 50787 | How many positive three-digit integers have an odd digit in both the… | Medium | |
| 50829 | The security gate at a storage facility requires a four-digit lock code | Medium | |
| 50951 | x, a, z, and b are single digit positive integers | Medium | |
| 50981 | Find unit digit of N when N = 63^1!+2!+...+63 | Medium | |
| 51081 | If the number 52,1n9, where n represents the tens digit, is a… | Medium | |
| 51084 | If a is a positive integer, and if the units digit of… | Medium | |
| 51100 | Of the three- digit integers greater than 700, how many have two… | Medium | |
| 51134 | How many positive 5-digit integers have the odd sum B of their… | Medium | |
| 51136 | How many 5-digit positive integers are there, where each digit is positive… | Medium | |
| 51326 | When we multiply a certain two digit number by the sum of… | Medium | |
| 51481 | Of the six-digit positive integers that have no digits equal to zero… | Medium | |
| 51539 | Of the two-digit positive integers that have no digits equal to zero… | Medium | |
| 51557 | How many positive integers of three different digits, each less than 400… | Medium | |
| 51619 | In the following sum, “?”, stands for which digit | Medium | |
| 51692 | In the decimal expansion of (2/5)^8 what is the eighth digit to… | Medium | |
| 51800 | 8k8 + k88 -------- 1,6w6 If k and w represent non-zero digits… | Medium | |
| 51945 | The age of teacher is the same as the digit in the… | Medium | |
| 51957 | X and Y are both integers | Medium | |
| 52000 | A three-digit code for certain locks uses the digits 0, 1, 2… | Medium | |
| 52007 | s(n) is a n-digit number formed by attaching the first n perfect… | Medium | |
| 52020 | The sum of the two digits of a number is 10 | Medium | |
| 52177 | If X^y denotes x raised to the power y, then find last… | Medium | |