| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 21 | Multiplication Table Generator | Easy | LoopsFor LoopI/O |
| 22 | Cross Sum of a Matrix | Easy | LoopsNested Loop2D Array |
| 23 | Digit Frequency Histogram | Easy | LoopsLoopArray |
| 24 | Star Pattern Printer | Easy | LoopsNested LoopsOutput |
| 25 | Multiplication Table Grid | Easy | LoopsNested LoopFormatting |
| 26 | Triangular Number Series | Easy | LoopsLoopMath |
| 27 | Prime Number Checker | Easy | LoopsLoopMath |
| 28 | Number Guessing Game | Easy | LoopsWhile LoopRandom |
| 29 | Collatz Sequence | Easy | LoopsWhile LoopConditions |
| 30 | Hollow Rectangle Pattern | Easy | LoopsNested LoopConditions |
| 31 | Harmonic Sum | Easy | LoopsFor LoopFloat |
| 32 | Count Digits Frequency | Easy | LoopsLoopArray |
| 33 | Power Calculator | Easy | LoopsLoopMath |
| 34 | Kaprekar Number Checker | Easy | LoopsLoopMath |
| 35 | Abundant and Deficient Classifier | Easy | LoopsLoopDivisors |
| 36 | Vowel Counter | Easy | StringsStringLoop |
| 37 | Word Mirror Checker | Easy | StringsStringReverse |
| 38 | Word Counter | Easy | StringsStringSplit |
| 39 | Title Case Converter | Easy | StringsStringManipulation |
| 40 | Run-Length Decoder | Easy | StringsStringParsing |