| 36989 | how many 6 digits numbers have all their digits either all odd… | Medium | |
| 37005 | Find the unit's digit in 264^102 + 264^103 | Medium | |
| 37011 | How many four-digit numbers that do not contain the digits 2, 3… | Medium | |
| 37050 | If the two-digit integers F and N are positive and have the… | Medium | |
| 37086 | Each of 16 individuals is to be given an identifying code consisting… | Medium | |
| 37133 | In a two-digit, if it is known that its unit’s digit exceeds… | Medium | |
| 37166 | How many total numbers of not more than 20 digits that can… | Medium | |
| 37479 | How many times digit 6 is used while writing numbers from 150… | Medium | |
| 37520 | How many seven-digit numbers that do not contain the digits 2 or… | Medium | |
| 37721 | If XY denotes X is raised to the power Y, Find the… | Medium | |
| 37742 | A three digit non-zero number 'abc' in base 5, when converted to… | Medium | |
| 37945 | How many 7 digit number are there having the digit 3 three… | Medium | |
| 38087 | How many three digit numbers can be formed using the digits {1… | Medium | |
| 38142 | How many 4 digit numbers can be formed with the digits 0… | Medium | |
| 38147 | Kingfisher company plans to assign identification numbers to its employees | Medium | |
| 38160 | When 25 is subtracted from a number, it reduces to seven-twelve of… | Medium | |
| 38166 | There are 8 digit mobile no's | Medium | |
| 38311 | Employees of a certain company are each to receive a unique 6-digit… | Medium | |
| 38666 | The digit in unit's place of the product 81 ×82×.....×89 is | Medium | |
| 38673 | Find the number of digits that are to be used in numbering… | Medium | |
| 38711 | For positive integer x, if the sum of all the digit of… | Medium | |
| 38744 | What is the units digit of 2222^(555)*3333^(222) | Medium | |
| 38751 | How many four-digit numbers that do not contain the digits 2, 3… | Medium | |
| 38802 | How many 6-digit even numbers can be formed from the digits 1… | Medium | |
| 38934 | What is the units' digit of the following expression (10)^5*(12)^5*(18)^5 | Medium | |
| 39097 | Find the last 2 digits 65*29*37*63*71*87*62 | Medium | |
| 39240 | A number of the form 213ab, where a and b are digits… | Medium | |
| 39245 | Using only the digits from 0 to 6 , how many 5… | Medium | |
| 39298 | How many integers between 1 and 10^20 are such that the sum… | Medium | |
| 39329 | What is the unit digit in {(6374)^1793 x (625)^317 x (341^491)} | Medium | |
| 39367 | 8k8 + k88 -------- 1,6e6 If k and e represent non-zero digits… | Medium | |
| 39424 | There is a five-digit number | Medium | |
| 39465 | How many four-digit integers exist such that all their digits are odd | Medium | |
| 39591 | In the simple subtraction problem below some single digits are replaced by… | Medium | |
| 39616 | The sum of all the digits of the integers from 18 to… | Medium | |
| 39675 | Of the three-digit integers greater than 700, how many have distinct digits | Medium | |
| 39686 | All even numbers from 2 to 98 inclusive, except those ending in… | Medium | |
| 39721 | What is the sum of all four digit integers formed using the… | Medium | |
| 39731 | Find the unit's digit in the product 2467 153 * 34172 | Medium | |
| 39764 | 1,257 1,275 1,527 | Medium | |
| 39949 | An intelligence agency forms a code of two distinct digits selected from… | Medium | |
| 39983 | One boy forgot the last digit of a 7digit telephone no | Medium | |
| 40002 | If abcd represents a positive four-digit number, where a, b, c and… | Medium | |
| 40054 | Of the three- digit integers greater than 700, how many have two… | Medium | |
| 40098 | how many five digit numbers are there such that two left most… | Medium | |
| 40166 | If ab represents a positive two-digit number, where a and b are… | Medium | |
| 40192 | How many digits are in (12×10^14)(10×10^15) | Medium | |
| 40255 | find the last digit of 322^369 | Medium | |
| 40314 | If ab represents a positive two digit number, where a and b… | Medium | |
| 40420 | How many positive integers less than 300 can be formed using the… | Medium | |