| 106564 | Counting Principles · Try It 5 | Easy | OpenStax | |
| 106566 | Counting Principles · Try It 6 | Easy | OpenStax | |
| 106567 | Counting Principles · Try It 7 | Easy | OpenStax | |
| 106569 | Counting Principles · Try It 8 | Easy | OpenStax | |
| 106571 | Counting Principles · Try It 9 | Easy | OpenStax | |
| 106573 | Counting Principles · Try It 10 | Easy | OpenStax | |
| 106580 | Counting Principles · Exercise 14 | Medium | OpenStax | |
| 106582 | Counting Principles · Exercise 16 | Medium | OpenStax | |
| 106584 | Counting Principles · Exercise 18 | Medium | OpenStax | |
| 106586 | Counting Principles · Exercise 20 | Medium | OpenStax | |
| 106588 | Counting Principles · Exercise 22 | Medium | OpenStax | |
| 106590 | Counting Principles · Exercise 24 | Medium | OpenStax | |
| 106592 | Counting Principles · Exercise 26 | Medium | OpenStax | |
| 106594 | Counting Principles · Exercise 28 | Medium | OpenStax | |
| 106596 | Counting Principles · Exercise 30 | Medium | OpenStax | |
| 106598 | Counting Principles · Exercise 32 | Medium | OpenStax | |
| 106600 | Counting Principles · Exercise 34 | Medium | OpenStax | |
| 106602 | Counting Principles · Exercise 36 | Medium | OpenStax | |
| 106604 | Counting Principles · Exercise 38 | Medium | OpenStax | |
| 106606 | Counting Principles · Exercise 40 | Medium | OpenStax | |
| 106608 | Counting Principles · Exercise 42 | Deep | OpenStax | |
| 106612 | Counting Principles · Exercise 46 | Deep | OpenStax | |
| 106614 | Counting Principles · Exercise 48 | Medium | OpenStax | |
| 106616 | Counting Principles · Exercise 50 | Medium | OpenStax | |
| 106618 | Counting Principles · Exercise 52 | Medium | OpenStax | |
| 106620 | Counting Principles · Exercise 54 | Medium | OpenStax | |
| 106624 | Counting Principles · Exercise 58 | Medium | OpenStax | |
| 106626 | Counting Principles · Exercise 60 | Medium | OpenStax | |
| 21412 | seven family members: 5 grandchildren (3 brothers and 2 sisters) and their… | Medium | AQuA | |
| 30858 | Carmelo and LeBron participate in a seven-person footrace on the basketball court… | Medium | AQuA | |
| 38628 | How many such pairs of digits are there in the number '5391246'… | Medium | AQuA | |
| 48642 | eight family members: 5 grandchildren (3 brothers and 2 sisters) and their… | Medium | AQuA | |
| 48871 | Bob is about to hang his 8 shirts in the wardrobe | Medium | AQuA | |
| 48985 | A certain game pays players in tokens, each of which is worth… | Medium | AQuA | |
| 53135 | If each permutation of the digits 1,2,3,4,5,6 are listed in the increasing… | Medium | AQuA | |
| 56135 | Sherlock Homes and Dr | Medium | AQuA | |
| 57117 | six family members: 5 grandchildren (3 brothers and 2 sisters) and their… | Medium | AQuA | |
| 57541 | A and B participate in a seven-person footrace on the basketball court… | Medium | AQuA | |
| 57591 | How many ways are there to lay four balls, colored red, black… | Medium | AQuA | |
| 59531 | How many ways can a selection be done of 5 letters out… | Medium | AQuA | |
| 62836 | Which of the following is the ninth to the right of the… | Medium | AQuA | |
| 68001 | ten family members: 5 grandchildren (3 brothers and 2 sisters) and their… | Medium | AQuA | |
| 69205 | eleven family members: 5 grandchildren (3 brothers and 2 sisters) and their… | Medium | AQuA | |
| 88542 | There are 4 different letters and 4 addressed envelopes.In how many ways… | Medium | AQuA | |
| 18798 | There are k-2 members in a certain band, including Jim and Ellen | Medium | AQuA | |
| 18941 | Company A has 13 employees, 9 of whom belong to the union | Medium | AQuA | |
| 19008 | To furnish a room in a model home an interior decorator is… | Medium | AQuA | |
| 19090 | In how many ways can a Chief Minister and a Vice Minister… | Medium | AQuA | |
| 19166 | How many ways are there for 3 males and 3 females to… | Medium | AQuA | |
| 19202 | In how many a committee of 5 members can be selected from… | Medium | AQuA | |