| 61452 | 71 a3 +1b ___ 98 If a and b represent positive single… | Medium | |
| 61610 | What is the tens digit of 36^12 | Medium | |
| 61686 | ASvennumber is defined as a five-digit number which goes according to the… | Medium | |
| 61788 | A warehouse is labeling computer inventory with 4-digit codes | Medium | |
| 61895 | A local bank that has 18 branches uses a two-digit code to… | Medium | |
| 62180 | A telephone company needs to create a set of 3-digit area codes | Medium | |
| 62200 | What is the 9th digit to the right of the decimal point… | Medium | |
| 62243 | How many 3 digit odd numbers do not use any digit more… | Medium | |
| 62292 | What is the units digit of the expression 14^7−17^4 | Medium | |
| 62333 | What is the sum of all four digit integers formed using the… | Medium | |
| 62462 | What is the units digit of 17^83 × 13^82 × 11^87 | Medium | |
| 62483 | If a is a positive integer, and if the units digit of… | Medium | |
| 62509 | If n = (32)^43 + (43)^33 what is the units digit of… | Medium | |
| 62942 | what is the units digit of the expression 7^75+6 | Medium | |
| 62974 | A five digit number is to be formed using each of the… | Medium | |
| 63045 | X and Y are both integers | Medium | |
| 63061 | In a three digit number, the hundred digit is 2 more than… | Medium | |
| 63072 | What is the unit digit of (8!*4 | Medium | |
| 63088 | What are the last two digits of (301*402*503*604*645*547*448*349)^2 | Medium | |
| 63345 | How many digits will be there to the right of the decimal… | Medium | |
| 63349 | In a two digit number, if it is known that its units… | Medium | |
| 63358 | The set X consists of the following terms: {4,44,444,4444,.....}, where the nth… | Medium | |
| 63403 | The unit digit in the product 4556*3432*4581*2784 is | Medium | |
| 63563 | If the units digit of n^43 is 7, which of the following… | Medium | |
| 63564 | What is the units digit of the product of the first 50… | Medium | |
| 63679 | X Y +Y X ________ The sum of the two digit numbers… | Medium | |
| 63742 | How many times digit 7 is used while writing numbers from 1… | Medium | |
| 63905 | What is the sum of all possible 3-digit numbers that can be… | Medium | |
| 64029 | How many digits are in (8×10^10)(10×10^5) | Medium | |
| 64398 | What is the units digit of (493) (915) (381) (756) (28) | Medium | |
| 64405 | If d=1/(2^3*5^6) is expressed as a terminating decimal, how many nonzero digits… | Medium | |
| 64427 | If the units digit of n^27 is 7, which of the following… | Medium | |
| 64516 | Of the integers between 100 and 799, inclusive, how many do not… | Medium | |
| 64575 | How many integerskgreater than 100 and less than 900 are there such… | Medium | |
| 64641 | Of the integers between 200 and 799, inclusive, how many do not… | Medium | |
| 64879 | 2,345 2,354 2,435 | Medium | |
| 64936 | If n = 8^11 – 1, what is the units digit of… | Medium | |
| 64946 | If a two-digit positive integer has its digits reversed, the resulting integer… | Medium | |
| 65009 | If the tens digit x and the units digit y of a… | Medium | |
| 65098 | A palindrome is a number that reads the same forward and backward… | Medium | |
| 65223 | How many integers between 4000 and 5000 that have distinct digits and… | Medium | |
| 65455 | What is the least number of digits (including repetitions) needed to express… | Medium | |
| 65493 | How many integers between 324,700 and 478,600 have tens digit 1 and… | Medium | |
| 65565 | What is the units digit of (147^25)^50 | Medium | |
| 65607 | The unit digit in the product (224 * 607 * 214 *… | Medium | |
| 65705 | If a and b are positive integers and x = 6^a and… | Medium | |
| 65770 | What is the unit digit in 14^100 | Medium | |
| 65841 | How many integers k greater than 100 and less than 1100 are… | Medium | |
| 65955 | A telephone company needs to create a set of 3-digit area codes | Medium | |
| 65997 | Q and R are two-digit positive integers that have the same digits… | Medium | |