diff --git a/src/algorithms/math/manhattan-distance/README.md b/src/algorithms/math/manhattan-distance/README.md
new file mode 100644
index 00000000..e69de29b
diff --git a/src/algorithms/math/manhattan-distance/__test__/manhattanDistance.test.js b/src/algorithms/math/manhattan-distance/__test__/manhattanDistance.test.js
new file mode 100644
index 00000000..b76f36a2
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+++ b/src/algorithms/math/manhattan-distance/__test__/manhattanDistance.test.js
@@ -0,0 +1,7 @@
+import manhattanDistance from '../manhattanDistance';
+
+describe('manhattanDistance', () => {
+    it('should calculate the manhattan distance', () => {
+        expect(manhattanDistance(1,1)).toEqual(1);
+    })
+})
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diff --git a/src/algorithms/math/manhattan-distance/manhattanDistance.js b/src/algorithms/math/manhattan-distance/manhattanDistance.js
new file mode 100644
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+++ b/src/algorithms/math/manhattan-distance/manhattanDistance.js
@@ -0,0 +1,19 @@
+//This function is calculate the manhattan distance
+/** 
+* @param {string} x
+* @param {string} y
+* @return {string}
+*/
+export default function manhattanDistance(x, y){
+
+let SumOfManhattanDistance = 0;
+
+for (let i = 0; i < x.length; i++){
+	for (let j = 0; j < x[i].length ; j++){
+	//Compute the result of the Manhattan Distance
+	SumOfManhattanDistance += (Math.abs(x[i] -x[j])+Math.abs(y[i] - y[j]));
+	}
+}
+//Send the result back to the main function
+return SumOfManhattanDistance; 
+}
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diff --git a/src/algorithms/math/number-calculation/README.md b/src/algorithms/math/number-calculation/README.md
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+++ b/src/algorithms/math/number-calculation/README.md
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+ Calculate is even number
+ * @description - Checking if number is even using divisibility by 2
+ * 
+ * If number is divisible by 2 i.e remainder = 0, then it is even
+ * therefore, the function will return true
+ * 
+ * If number is not divisible by 2 i.e remainder != 0, then it is not even i.e odd
+ * therefore, the function will return false
+
+Calculate is even bitwise number
+  * @description - Checking if number is even using bitwise operator
+ * Bitwise AND (&) compares the bits of the 32
+ * bit binary representations of the number and
+ * returns a number after comparing each bit:
+ *
+ * 0 & 0 -> 0
+ * 0 & 1 -> 0
+ * 1 & 0 -> 0
+ * 1 & 1 -> 1
+ *
+ * For odd numbers, the last binary bit will be 1
+ * and for even numbers, the last binary bit will
+ * be 0.
+ *
+ * As the number is compared with one, all the
+ * other bits except the last will become 0. The
+ * last bit will be 0 for even numbers and 1 for
+ * odd numbers, which is checked with the use
+ * of the equality operator.
+
+Calculate is odd number
+  * @description -> Checking if number is odd using not divisibility by 2
+ * If number is not divisible by 2 i.e remainder = 1, then it is odd
+ * therefore, the function will return true
+ *
+ * If number is divisible by 2 i.e remainder != 1, then it is even
+ * therefore, the function will return false
+
+Calculate is odd bitwise
+   * @description -> Checking if number is even using bitwise operator
+  * Bitwise AND (&) compares the bits of the 32
+  * bit binary representations of the number and
+  * returns a number after comparing each bit:
+  *
+  * 0 & 0 -> 0
+  * 0 & 1 -> 0
+  * 1 & 0 -> 0
+  * 1 & 1 -> 1
+  *
+  * For every odd numbers, the last binary bit will be 1
+  * and for even numbers, the last binary bit will be 0.
+  *
+  * As the number is compared with one, all the
+  * other bits except the last will become 0. The
+  * last bit will be 0 for even numbers and 1 for
+  * odd numbers.
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diff --git a/src/algorithms/math/number-calculation/__test__/calcIsEven.test.js b/src/algorithms/math/number-calculation/__test__/calcIsEven.test.js
new file mode 100644
index 00000000..065f5980
--- /dev/null
+++ b/src/algorithms/math/number-calculation/__test__/calcIsEven.test.js
@@ -0,0 +1,23 @@
+import { calcIsEven } from "../calcIsEven";
+
+describe('calcIsEven', () => {
+    it('should calculate even number correctly', () => {
+        expect(calcIsEven(2)).toEqual(true);
+        expect(calcIsEven(4)).toEqual(true);
+    });
+    it('should throw an error in case if detect odd number', () =>{
+        expect(() => calcIsEven(3).toThrowError('It is odd number'))
+    });
+});
+
+import { calcIsEvenBitwise } from "../calcIsEven";
+
+describe('calcIsEvenBitwise', () => {
+    it('should calculate even bitwise number correctly', () => {
+        expect(calcIsEvenBitwise(2)).toEqual(true);
+        expect(calcIsEvenBitwise(4)).toEqual(true);
+    });
+    it('should throw an error in case if detect odd number', () =>{
+        expect(() => calcIsEvenBitwise(3).toThrowError('It is odd bitwise number'))
+    });
+});
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diff --git a/src/algorithms/math/number-calculation/__test__/calcIsOdd.test.js b/src/algorithms/math/number-calculation/__test__/calcIsOdd.test.js
new file mode 100644
index 00000000..c798d7d4
--- /dev/null
+++ b/src/algorithms/math/number-calculation/__test__/calcIsOdd.test.js
@@ -0,0 +1,23 @@
+import { calcIsOdd } from "../calcIsOdd";
+
+describe('calcIsOdd', () => {
+    it('should calculate odd number correctly', () => {
+        expect(calcIsOdd(1)).toEqual(true);
+        expect(calcIsOdd(3)).toEqual(true);
+    });
+    it('should throw an error in case if detect even number', () =>{
+        expect(() => calcIsOdd(8).toThrowError('It is even number'))
+    });
+});
+
+import { calcIsOddBitwise } from "../calcIsOdd";
+
+describe('calcIsOddBitwise', () => {
+    it('should calculate odd bitwise number correctly', () => {
+        expect(calcIsOddBitwise(1)).toEqual(true);
+        expect(calcIsOddBitwise(3)).toEqual(true);
+    });
+    it('should throw an error in case if detect even number', () =>{
+        expect(() => calcIsOddBitwise(6).toThrowError('It is even bitwise number'))
+    });
+});
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diff --git a/src/algorithms/math/number-calculation/calcIsEven.js b/src/algorithms/math/number-calculation/calcIsEven.js
new file mode 100644
index 00000000..114b2958
--- /dev/null
+++ b/src/algorithms/math/number-calculation/calcIsEven.js
@@ -0,0 +1,14 @@
+/**
+ * @function calcIsEven
+ * @param {number} number
+ * @return {boolean}
+ */
+ export const calcIsEven = (number) => number % 2 === 0
+
+
+ /**
+ * @function calcIsEvenBitwise
+ * @param {number} number
+ * @returns {boolean}
+ */
+export const calcIsEvenBitwise = (number) => (number & 1) === 0
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diff --git a/src/algorithms/math/number-calculation/calcIsOdd.js b/src/algorithms/math/number-calculation/calcIsOdd.js
new file mode 100644
index 00000000..aebbd291
--- /dev/null
+++ b/src/algorithms/math/number-calculation/calcIsOdd.js
@@ -0,0 +1,15 @@
+/**
+ * @function calcIsOdd
+ * @param {number} number
+ * @returns {boolean}
+ */
+ const calcIsOdd = (number) => Boolean(number % 2) // 1 -> true, 0 -> false
+
+ /**
+  * @function calcIsOddBitwise
+  * @param {number} number
+  * @returns {boolean}
+ */
+ const calcIsOddBitwise = (number) => Boolean(number & 1) // 1 -> true, 0 -> false
+ 
+ export { calcIsOdd, calcIsOddBitwise }
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