1- https://codeforces.com/contest/1355/problem/A
1- https://www.codechef.com/problems/MARBLES
2- https://codeforces.com/contest/1354/problem/A
3- https://codeforces.com/contest/1354/problem/B
1- https://practice.geeksforgeeks.org/problems/ugly-numbers/0
2- https://practice.geeksforgeeks.org/problems/nth-fibonacci-number/0
3- https://leetcode.com/explore/featured/card/top-interview-questions-easy/92/array/564/
1- https://codeforces.com/contest/205/problem/B
2- https://leetcode.com/explore/featured/card/top-interview-questions-easy/92/array/578/
3- https://leetcode.com/explore/featured/card/top-interview-questions-easy/92/array/549/
4- https://leetcode.com/explore/featured/card/top-interview-questions-easy/92/array/674/
5- https://leetcode.com/explore/featured/card/top-interview-questions-easy/92/array/559/
6- Find Permutation Coefficient (use DP, although it takes O(n x k)).
1- https://leetcode.com/explore/featured/card/top-interview-questions-easy/92/array/567/
2- https://leetcode.com/explore/featured/card/top-interview-questions-easy/92/array/769/
{ Lab Tests/ Intern work took over me }
1- https://codeforces.com/contest/1360 - Problems A-D
1- https://www.interviewbit.com/problems/add-one-to-number/
1- https://www.interviewbit.com/problems/maximum-absolute-difference/
1- https://www.codechef.com/LTIME84B/problems/LOSTWKND
2- https://www.codechef.com/LTIME84B/problems/WWALK
1- https://www.interviewbit.com/problems/fizzbuzz/
2- https://www.interviewbit.com/problems/trailing-zeros-in-factorial/
1- https://www.interviewbit.com/problems/sum-of-pairwise-hamming-distance/
1- https://www.interviewbit.com/problems/repeat-and-missing-number-array/