| 81085 | There is a sequence such that each term is positive integer and… | Medium | |
| 81226 | Set X consists of all two-digit primes and set Y consists of… | Medium | |
| 81323 | How many tow-digit integers exist such that all their digits are even | Medium | |
| 81332 | The sum of the digits of a two-digit number is 9 less… | Medium | |
| 81387 | What is the last digit in the product (3^65 x 6^59 x… | Medium | |
| 81488 | how many 3 digit numbers can be formed with 2 consecutive same… | Medium | |
| 81573 | 8k8 + k88 -------- 1,6t6 If k and t represent non-zero digits… | Medium | |
| 81855 | How many five-digit numbers that do not contain the digits 4 or… | Medium | |
| 81960 | How many six-digit numbers that do not contain the digits 5 or… | Medium | |
| 81965 | All of the citizens of a country have a six-character or seven-character… | Medium | |
| 81984 | If the number obtained on interchanging the digits of a two digit… | Medium | |
| 82043 | How many numbers can be formed from 1, 2, 3, 4, 5… | Medium | |
| 82063 | How many three digits numbers can be formed by using the digits… | Medium | |
| 82086 | A number consists of two digits | Medium | |
| 82184 | The security gate at a storage facility requires a five-digit lock code | Medium | |
| 82189 | The standard serial numbers for medical licence are 3 letters followed by… | Medium | |
| 82240 | What is the 4 digit number whose second digit is thrice the… | Medium | |
| 82408 | Difference between a two-digit number and the number obtained by interchanging the… | Medium | |
| 82466 | How many different three-digit multiples of 5 can be composed of digits… | Medium | |
| 82545 | The number of digits of the smallest number, which when multiplied by… | Medium | |
| 82729 | When positive integer x is divided by positive integer y, the result… | Medium | |
| 82829 | What is the 10 digit to the right of the decimal point… | Medium | |
| 82852 | If a is a positive integer, and if the units digit of… | Medium | |
| 82890 | How many two-digit integers exist such that all their digits are odd | Medium | |
| 82916 | AZ + CD = AAA, where AZ and CD are two-digit numbers… | Medium | |
| 82921 | Find Unit digit of(7^71*6^59*3^65) | Medium | |
| 82981 | In a two digit number it is known that its unit's digit… | Medium | |
| 82992 | How many four-digit positive integers can be formed by using the digits… | Medium | |
| 83039 | If d=(10^10)-47, what is the sum of all the digit of d | Medium | |
| 83149 | A three-character password consists of one letter of the alphabet and two… | Medium | |
| 83228 | Of the three- digit integers greater than 700, how many have two… | Medium | |
| 83279 | Let d(n) represent the sum of the digits of the integer n | Medium | |
| 83306 | In a two-digit number, the digit in the unit's place is more… | Medium | |
| 83337 | When a certain number 'x' is multiplied bt 18, the product 'y'… | Medium | |
| 83539 | How many numbers can be formed with the digits 1, 6, 7… | Medium | |
| 84180 | Find the sum of all 4 digit numbers formed using digits 1,2,5,6 | Medium | |
| 84567 | The sum of three digits a number is 17 | Medium | |
| 84867 | 1,257 1,275 1,527 | Medium | |
| 84923 | Two digits in John's age are the same as the digit in… | Medium | |
| 84941 | What is the sum of all two digit numbers | Medium | |
| 84952 | The integer A has a tens digit of 6 and a units… | Medium | |
| 84994 | A palindrome is a number which reads the same when read forward… | Medium | |
| 85114 | what is the sum of all 5 digits numbers which can be… | Medium | |
| 85217 | consider a no 235, where last digit is the sum of first… | Medium | |
| 85484 | How many three-digit numbers satisfy this property.: The last digit (unit's digit)… | Medium | |
| 85608 | How many odd integers F between 200 and 600 are there such… | Medium | |
| 85626 | The sum of 5 different positive 2-digit integers is 130 | Medium | |
| 85662 | Given that p is a positive even integer with a positive units… | Medium | |
| 85721 | 72 hens cost Rs | Medium | |
| 85734 | What is the unit digit in (4137)754 | Medium | |