| 51805 | A warehouse is labeling computer inventory with 4-digit codes | Medium | |
| 51834 | If the number 52,1n5, where n represents the tens digit, is a… | Medium | |
| 51885 | Meena wrote all the numbers from 1 to 59,999 inclusive | Medium | |
| 51994 | If the sum of 1/3 and 1/5 is converted to a decimal… | Medium | |
| 51997 | How many odd numbers are possible between 1 to 100000 | Medium | |
| 52086 | If n = (33)^40 + (43)^33 what is the units digit of… | Medium | |
| 52168 | ASvennumber is defined as a five-digit number which goes according to the… | Medium | |
| 52236 | One half of a two digit number exceeds its one third by… | Medium | |
| 52397 | What is the tenth digit of (4!*3 | Medium | |
| 52437 | What is the units' digit of the following expression (6)^3*(14)^5*(2)^5 | Medium | |
| 52475 | With # andeach representing different digits in the problem below, the difference… | Medium | |
| 52483 | Of the integers between 100 and 899, inclusive, how many do not… | Medium | |
| 52512 | A palindrome is a number that reads the same forward and backward… | Medium | |
| 52657 | If a is a positive integer, and if the units digit of… | Medium | |
| 52717 | If 23^3*19^4*14^2 = x, what is the units digit of x | Medium | |
| 52824 | How many integers between 324,805 and 458,705 have tens digit 2 and… | Medium | |
| 52844 | How many integers between 2000 and 3000 that have distinct digits and… | Medium | |
| 52871 | If each of 3 digit code is formed of integers from 1… | Medium | |
| 53011 | What is the units digit of (44^4)(33^5)(21^6) | Medium | |
| 53108 | If integers ending in zero are excluded, what is the unit digit… | Medium | |
| 53313 | If the number 52,1n8, where n represents the tens digit, is a… | Medium | |
| 53353 | The unit digit in the product (124 * 812 * 816 *… | Medium | |
| 53406 | log3 N+log9 N what is 3 digit number N that will be… | Medium | |
| 53412 | How many integers from 101 to 700, inclusive, remains the value unchanged… | Medium | |
| 53487 | N and M are each 3-digit integers | Medium | |
| 53566 | How many odd numbers are possible between 1 to 10000000 | Medium | |
| 53812 | The unit digit in the product (445 * 534 * 999 *… | Medium | |
| 53866 | How many numbers with 2 different digits can be formed using only… | Medium | |
| 53867 | What is the least number of digits (including repetitions) needed to express… | Medium | |
| 53902 | How many 3 digit numbers that do not contain the digit 0… | Medium | |
| 53964 | How many digits will be there to the right of the decimal… | Medium | |
| 53971 | What is the unit digit in 7^100 | Medium | |
| 54004 | How many integers between 324,700 and 458,600 have tens digit 1 and… | Medium | |
| 54069 | How many integers between 324,700 and 468,600 have tens digit 1 and… | Medium | |
| 54072 | What is the tens digit of 7^1213 | Medium | |
| 54128 | If a is a positive integer, and if the units' digit of… | Medium | |
| 54217 | What is the units digit of (12^3)(15^4)(31^7) | Medium | |
| 54328 | Winners will be announced the following day at 11 AM Pacific/1 PM… | Medium | |
| 54356 | How many different positive integers exist between 10^7 and 10^8, the sum… | Medium | |
| 54793 | If log1087.5 = 2.9421, then the number of digits in (875)10 is | Medium | |
| 54956 | X and Y are both integers | Medium | |
| 55054 | A “palindromic integer” is an integer that remains the same when its… | Medium | |
| 55107 | How many times digit 6 is used while writing numbers from 100… | Medium | |
| 55272 | How many times digit 5 is used while writing numbers from 100… | Medium | |
| 55279 | If d=1/(2^3*5^11) is expressed as a terminating decimal, how many nonzero digits… | Medium | |
| 55382 | How many integers between 300 and 1100 are there such that their… | Medium | |
| 55406 | If (10^4 * 3.456789)^9 is written as a single term, how many… | Medium | |
| 55410 | if log 5 = 0.69897, the number of digits in 5128 is | Medium | |
| 55417 | When 20 is subtracted from a number, it reduces to seven-twelve of… | Medium | |
| 55551 | how many positive integers less than 9999 are such that the product… | Medium | |