When i first heard this scrimba challenge, I wasnt sure that i am going to participate but this is first ever challenge that i have completed in my lifetime.
You could have seen the excitement its like hiking in the moutain.
Thanks Scrimba for this amazing 24 day all thinking Javascriptmas.
Many Thanks!!
Below are the list of solutions from Scrimba #Javascriptmas challenge, (24/ 24 solutions out :) )

Day 1 : Problem : Candies,
Concepts Used : Math.floor

Day 2 : Problem : Deposit Profit,
Concepts Used : While loop

Day 3 : Problem : Chunky Monkey,
Concepts Used : For loop, Array.Slice, Array.push

Day 4 : Problem : Century from Year,
Concepts Used : Math.floor

Day 5 : Problem : String Reverse,
Concepts Used : str.split('').reverse().join('')

Day 6 : Problem : Sort by length,
Concepts Used : sort

Day 7 : Problem : countVowelConsonant,
Concepts Used : str.split('').reduce, Object.entries

Day 8 : Rolling Dice

Day 9 : sumOddFibonacciNumbers

Day 10 : adjacentElementsProduct

Day 11 : avoidObstacles

Day 12 : Time 24 hour clock

Day 13 : Extract Kth element

Day 14 : arrayMaximalAdjacentDifference

Day 15 : JS Carousel

Day 16 : insertDashes

Day 17 : differentSymbolsNaive
Concepts in solution

1. For loop
2. Using set
3. Arrays
4. loadash
5. Array type2
6. While loop

Day 18 : arrayPreviousLess

Day 19 : Alphabetsubsequence, Learnt : charcodeat

Day 20 : Domain Challenge : Learnt: Pop, Push, Split (Stack)

Day 21 : Array Sum : Hasownproperty()

Day 22 : Rectangular Array

Day 23 : Twitter Model , Learnt : Eventlisteners

Day 24 : PinWheel