diff --git a/DIRECTORY.md b/DIRECTORY.md
index 6c5da30d1..a5b0f6f33 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -113,6 +113,7 @@
     * [PermutationinString](https://github.com/TheAlgorithms/Javascript/blob/master/Dynamic-Programming/Sliding-Window/PermutationinString.js)
   * [SudokuSolver](https://github.com/TheAlgorithms/Javascript/blob/master/Dynamic-Programming/SudokuSolver.js)
   * [TrappingRainWater](https://github.com/TheAlgorithms/Javascript/blob/master/Dynamic-Programming/TrappingRainWater.js)
+  * [TribonacciNumber](https://github.com/TheAlgorithms/Javascript/blob/master/Dynamic-Programming/TribonacciNumber.js)
   * [ZeroOneKnapsack](https://github.com/TheAlgorithms/Javascript/blob/master/Dynamic-Programming/ZeroOneKnapsack.js)
 
 ## Geometry
@@ -154,7 +155,6 @@
   * [CoPrimeCheck](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/CoPrimeCheck.js)
   * [DecimalIsolate](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/DecimalIsolate.js)
   * [DegreeToRadian](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/DegreeToRadian.js)
-  * [DigitSum](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/DigitSum.js)
   * [EulerMethod](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/EulerMethod.js)
   * [EulersTotient](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/EulersTotient.js)
   * [EulersTotientFunction](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/EulersTotientFunction.js)
@@ -167,6 +167,7 @@
   * [FigurateNumber](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/FigurateNumber.js)
   * [FindHcf](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/FindHcf.js)
   * [FindLcm](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/FindLcm.js)
+  * [FindMin](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/FindMin.js)
   * [GetEuclidGCD](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/GetEuclidGCD.js)
   * [GridGet](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/GridGet.js)
   * [IsDivisible](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/IsDivisible.js)
@@ -191,6 +192,7 @@
   * [PiApproximationMonteCarlo](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/PiApproximationMonteCarlo.js)
   * [Polynomial](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/Polynomial.js)
   * [Pow](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/Pow.js)
+  * [PowLogarithmic](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/PowLogarithmic.js)
   * [PrimeCheck](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/PrimeCheck.js)
   * [PrimeFactors](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/PrimeFactors.js)
   * [RadianToDegree](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/RadianToDegree.js)
@@ -231,7 +233,7 @@
   * [BinaryEquivalent](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/BinaryEquivalent.js)
   * [BinarySearch](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/BinarySearch.js)
   * [EucledianGCD](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/EucledianGCD.js)
-  * [factorial](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/factorial.js)
+  * [Factorial](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/Factorial.js)
   * [FibonacciNumberRecursive](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/FibonacciNumberRecursive.js)
   * [FloodFill](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/FloodFill.js)
   * [KochSnowflake](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/KochSnowflake.js)
@@ -294,8 +296,8 @@
   * [CheckPascalCase](https://github.com/TheAlgorithms/Javascript/blob/master/String/CheckPascalCase.js)
   * [CheckRearrangePalindrome](https://github.com/TheAlgorithms/Javascript/blob/master/String/CheckRearrangePalindrome.js)
   * [CheckSnakeCase](https://github.com/TheAlgorithms/Javascript/blob/master/String/CheckSnakeCase.js)
-  * [CheckVowels](https://github.com/TheAlgorithms/Javascript/blob/master/String/CheckVowels.js)
   * [CheckWordOccurrence](https://github.com/TheAlgorithms/Javascript/blob/master/String/CheckWordOccurrence.js)
+  * [CountVowels](https://github.com/TheAlgorithms/Javascript/blob/master/String/CountVowels.js)
   * [CreatePermutations](https://github.com/TheAlgorithms/Javascript/blob/master/String/CreatePermutations.js)
   * [DiceCoefficient](https://github.com/TheAlgorithms/Javascript/blob/master/String/DiceCoefficient.js)
   * [FormatPhoneNumber](https://github.com/TheAlgorithms/Javascript/blob/master/String/FormatPhoneNumber.js)
@@ -303,6 +305,7 @@
   * [HammingDistance](https://github.com/TheAlgorithms/Javascript/blob/master/String/HammingDistance.js)
   * [KMPPatternSearching](https://github.com/TheAlgorithms/Javascript/blob/master/String/KMPPatternSearching.js)
   * [LevenshteinDistance](https://github.com/TheAlgorithms/Javascript/blob/master/String/LevenshteinDistance.js)
+  * [Lower](https://github.com/TheAlgorithms/Javascript/blob/master/String/Lower.js)
   * [MaxCharacter](https://github.com/TheAlgorithms/Javascript/blob/master/String/MaxCharacter.js)
   * [MaxWord](https://github.com/TheAlgorithms/Javascript/blob/master/String/MaxWord.js)
   * [PatternMatching](https://github.com/TheAlgorithms/Javascript/blob/master/String/PatternMatching.js)
@@ -310,8 +313,10 @@
   * [ReverseString](https://github.com/TheAlgorithms/Javascript/blob/master/String/ReverseString.js)
   * [ReverseWords](https://github.com/TheAlgorithms/Javascript/blob/master/String/ReverseWords.js)
   * [ScrambleStrings](https://github.com/TheAlgorithms/Javascript/blob/master/String/ScrambleStrings.js)
+  * [Upper](https://github.com/TheAlgorithms/Javascript/blob/master/String/Upper.js)
   * [ValidateCreditCard](https://github.com/TheAlgorithms/Javascript/blob/master/String/ValidateCreditCard.js)
   * [ValidateEmail](https://github.com/TheAlgorithms/Javascript/blob/master/String/ValidateEmail.js)
+  * [ValidateUrl](https://github.com/TheAlgorithms/Javascript/blob/master/String/ValidateUrl.js)
 
 ## Timing-Functions
   * [GetMonthDays](https://github.com/TheAlgorithms/Javascript/blob/master/Timing-Functions/GetMonthDays.js)
@@ -320,3 +325,4 @@
 ## Trees
   * [BreadthFirstTreeTraversal](https://github.com/TheAlgorithms/Javascript/blob/master/Trees/BreadthFirstTreeTraversal.js)
   * [DepthFirstSearch](https://github.com/TheAlgorithms/Javascript/blob/master/Trees/DepthFirstSearch.js)
+  * [FenwickTree](https://github.com/TheAlgorithms/Javascript/blob/master/Trees/FenwickTree.js)
diff --git a/Maths/DigitSum.js b/Maths/DigitSum.js
deleted file mode 100644
index e4a93d5bb..000000000
--- a/Maths/DigitSum.js
+++ /dev/null
@@ -1,16 +0,0 @@
-// program to find sum of digits of a number
-
-// function which would calculate sum and return it
-const digitSum = (num) => {
-  // sum will store sum of digits of a number
-  let sum = 0
-  // while will run until num become 0
-  while (num) {
-    sum += num % 10
-    num = parseInt(num / 10)
-  }
-
-  return sum
-}
-
-export { digitSum }
diff --git a/Maths/test/DigitSum.test.js b/Maths/test/DigitSum.test.js
deleted file mode 100644
index c9c828be5..000000000
--- a/Maths/test/DigitSum.test.js
+++ /dev/null
@@ -1,11 +0,0 @@
-import { digitSum } from '../DigitSum'
-
-describe('digitSum', () => {
-  it('is a function', () => {
-    expect(typeof digitSum).toEqual('function')
-  })
-  it('should return the sum of digits of a given number', () => {
-    const sumOfNumber = digitSum(12345)
-    expect(sumOfNumber).toBe(15)
-  })
-})