Last Updated: 15 Mar, 2026

21 Days Beginner Coding Challenge

Solve the 21 Days Beginner Coding Challenge and get exciting prizes.
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Hot topics
Arrays
Hash Table
Linked List
Loops
Matrices (2D Arrays)
Recursion
Stacks & Queues
Strings
Categories
Problem Title
Exp
Difficulty
Avg. time
Attempted
Upvotes
yellow-spark
10
Easy
-
7.2k
upvote
40
yellow-spark
10
Easy
-
4.7k
upvote
7
yellow-spark
10
Easy
-
4.7k
upvote
3
yellow-spark
120
Hard
40 mins
4.4k
upvote
91
yellow-spark
40
Easy
15 mins
2.4k
upvote
46
yellow-spark
40
Easy
10 mins
2.5k
upvote
58
yellow-spark
40
Easy
10 mins
6.3k
upvote
38
yellow-spark
40
Easy
15 mins
5.8k
upvote
41
yellow-spark
10
Easy
-
4.6k
upvote
2
yellow-spark
10
Easy
-
4.5k
upvote
1
yellow-spark
10
Easy
-
6k
upvote
0
yellow-spark
40
Easy
10 mins
16.3k
upvote
92
yellow-spark
40
Easy
15 mins
10.7k
upvote
235
yellow-spark
40
Easy
10 mins
2.7k
upvote
11
yellow-spark
40
Easy
15 mins
26.9k
upvote
170
yellow-spark
40
Easy
15 mins
0.4k
upvote
8
yellow-spark
10
Easy
-
2.9k
upvote
1
yellow-spark
10
Easy
-
2.8k
upvote
0
yellow-spark
40
Easy
35 mins
12.9k
upvote
39
yellow-spark
40
Easy
15 mins
4.8k
upvote
80
yellow-spark
40
Easy
10 mins
6.6k
upvote
61
yellow-spark
40
Easy
15 mins
21.6k
upvote
302
yellow-spark
40
Easy
10 mins
20.7k
upvote
273