| ID |
Title |
Solutions and Code |
| 1 |
Multiples of 3 and 5 |
Solution |
| 2 |
Even Fibonacci numbers |
Solution |
| 3 |
Largest prime factor |
Solution | Code |
| 4 |
Largest palindrome product |
Solution | Code |
| 5 |
Smallest multiple |
Solution | Code |
| 6 |
Sum square difference |
Solution |
| 7 |
10001st prime |
Solution | Code |
| 8 |
Largest product in a series |
|
| 9 |
Special Pythagorean triplet |
Solution | Code |
| 10 |
Summation of primes |
Solution | Code |
| 11 |
Largest product in a grid |
|
| 12 |
Highly divisible triangular |
Solution | Code |
| 13 |
Large sum |
Solution | Code |
| 14 |
Longest Collatz sequence |
Solution | Code |
| 15 |
Lattice paths |
|
| 16 |
Power digit sum |
|
| 17 |
Number Letter Counts |
|
| 18 |
Maximum Path Sum I |
|
| 19 |
Counting Sundays |
|
| 20 |
Factorial Digit Sum |
|