| 65306 | A sealed envelope contains a card with a single digit written on… | Medium | |
| 65379 | What are the last two digits of 5in2007th | Medium | |
| 65424 | How many three digit numbers that do not contain the digit 2… | Medium | |
| 65717 | How many 6 digit positive integers exist such that no two consecutive… | Medium | |
| 65836 | If a and b are two-digit integers such that a > 20… | Medium | |
| 65908 | Find the total no of 10 digits whose sum is 4 | Medium | |
| 65950 | If A = 625 * 7776 * 16 / 1296, How many… | Medium | |
| 66033 | Which of the following is closest to the difference between sum Q… | Medium | |
| 66035 | Q | Medium | |
| 66050 | What is the unit digit in the product (3^65 x 6^59 x… | Medium | |
| 66060 | Find unit digit of{(6374)^1793 x (625)^317 x (341)^491} | Medium | |
| 66067 | If CD represents a positive two digit number, where C and D… | Medium | |
| 66183 | If (x × 10^q) – (y × 10^r) = 10^r, where q… | Medium | |
| 66192 | A three-digit code for certain locks uses the digits 0, 1, 2… | Medium | |
| 66354 | Which of the following is closest to the difference between sum Z… | Medium | |
| 66419 | Given A+B+C+D+E= FG | Medium | |
| 66425 | How many three-digit numbers are there such that all three digits are… | Medium | |
| 66470 | Suppose there is a number 235 such that sum of first two… | Medium | |
| 66609 | How many 5 digit nos are there if the 2 leftmost digits… | Medium | |
| 66668 | Employees of a certain company are each to receive a unique 5-digit… | Medium | |
| 66677 | How many 6 digit even numbers can be formed from digits 1… | Medium | |
| 66770 | How many odd 4-digit positive integers W that are multiples of 5… | Medium | |
| 66785 | The difference between a five digit number and the number formed by… | Medium | |
| 66825 | How many digits are there to the right of the decimal point… | Medium | |
| 66842 | How many four-digit numbers that do not contain the digits 3 or… | Medium | |
| 67009 | What is the unit digit of 3^58 | Medium | |
| 67146 | Find the unit digit in 264^102+264^103 | Medium | |
| 67309 | A server generates random passwords of 3 letters followed by 3 digits | Medium | |
| 67402 | What is the tens' digit W of the sum of the first… | Medium | |
| 67426 | How many digits are there in the integer 8^7 × 25^12 | Medium | |
| 67474 | N= 1!+2!+3!.....+10 | Medium | |
| 68070 | I forgot the last digit of a 7-digit telephone number | Medium | |
| 68080 | How many five-digit numbers exist such that the product of their digits… | Medium | |
| 68307 | All numbers from 1 to 200 (in decimal system) are written in… | Medium | |
| 68493 | How many three digits numbers greater than 600 can be formed by… | Medium | |
| 68521 | If the tens digit of positive integers h, y are 6, how… | Medium | |
| 68738 | What is the units digit of the solution to 177^28−133^23 | Medium | |
| 69007 | How many odd 4-digit positive integers R that are multiples of 5… | Medium | |
| 69016 | What least number must be added to the least number of six… | Medium | |
| 69592 | If xy represents a positive two digit number, where x and y… | Medium | |
| 70082 | find The last digit in the product 287 x 287 + 269… | Medium | |
| 70089 | How many odd integers V between 200 and 600 are there such… | Medium | |
| 70125 | How can you get 81 using the digits 2, 3, 25, 50… | Medium | |
| 70267 | The security lock requires a five-digit lock code | Medium | |
| 70390 | How many four digit numbers can be formed using the digits {1… | Medium | |
| 70586 | What is the last digit of (2^3)^4 | Medium | |
| 70642 | There is a sequence such that each term is positive integer and… | Medium | |
| 70693 | What is the possible ways to make 3 digit numbers from 1… | Medium | |
| 71068 | How many digits are used to number a book containg 300 pages | Medium | |
| 71136 | The sum of all the digits of the integers from 18 to… | Medium | |