Challenge: 20 Euler problems in 100 days

This is a self challenge to solve 20 problems in next 100 days.

Here is the Code repo:

1. May 23rd: Summation of primes

2. May 24th: Largest Product in a Grid

3. May 27th: Highly divisible number

4. May 29th: Large Sum

5. June 6th: Power Digit Sum

6. June 7th: Lattice Paths

7. June 18th: Maximum path sum

8. June 19th: Factorial digit sum

9. June 19th: Amicable numbers

10. June 21st: Names scores

11. July 2nd: Non-abundant sums

12. July 3rd: N-digit Fibonacci number

13. July 13: Reciprocal cycles

14. August 12: Multiples of 3 and 5

15. August 12: Even Fibonacci numbers

16. August 12: Largest prime factor

17. August 12: Largest palindrome product

18. August 12: Smallest multiple

19. August 12: Sum square difference

20. August 12: 10001st prime

21. August 12: Largest product in a series

22. August 12: Special Pythagorean triplet