My solution

solution_1.js

@@ -0,0 +1,56 @@
+const arrToSort=[1,2,4,591,392,391,2,5,10,2,1,1,1,20,20];
+
+const cleanTheRoom = (arr)=>{
+    let sorted = arr.toSorted((a,b)=> a-b);
+    for(let i =0 ;i<sorted.length;i++){
+        if(typeof(sorted[i])==='string'){
+        grupByType(sorted);
+        break;
+        } else 
+        grupIdentical(sorted);
+    }
+}
+
+const grupIdentical=(arr)=>{
+    let grup=[];
+    let count=1;
+    for(let i = 0;i<arr.length;i++){
+        for(let j = i+1;j<arr.length;j++){
+            if(arr[i]===arr[j]){
+                count++
+            }
+        }
+        if(count>1&& i===0){
+            i+=count;
+            grup.push([arr.toSpliced(i,arr.length)]);
+            i--;
+            count = 1;
+        } else if(count>1&& i>3){
+            i+=count;
+            let subArr=arr.toSpliced(i,arr.length).toReversed();
+            grup.push([subArr.toSpliced(count,subArr.length)]);
+            subArr=[];
+            i--;
+            count = 1;
+        }
+        else{
+            grup.push(arr[i]);
+        }
+    }
+    console.log(grup);
+}
+
+const grupByType = (arr)=>{
+    let mainArr=[];
+    let stringArr=[];
+    let numArr=[];
+    for(let i =0 ;i<arr.length;i++){
+        if(typeof(arr[i])==='string'){
+            stringArr.push(arr[i]);
+        }else{
+            numArr.push(arr[i]);
+        }
+    }
+    mainArr.push([numArr],[stringArr]);
+    console.log(mainArr);
+}

solution_2.js

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+const toSume = (nums,target)=>{
+    let sum=0;
+    let newArray=[];
+    for(let i=0;i<nums.length;i++)
+    for(let j=1;j<nums.length;j++){
+        sum=nums[i]+nums[j];
+        if(sum==target && i!=j){
+        return newArray=[i,j];
+        }
+    }
+}

solution_3.js

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+const rgb2hex=(array)=> {
+	var result = "";
+	array.map(component => {
+		//changes rgb to hex component
+		var rgb = Number(component).toString(16);
+		//adds padding to components with length 1
+		rgb = rgb.length == 1 ? "0" + rgb : rgb;
+		result += rgb;		
+	})
+	return '#' + result
+}
+
+function hex2rgb(value) {
+	//finds red, green and blue components and writes them to array
+	var result = [value.slice(0,2), value.slice(2,4), value.slice(4)];
+	//changes hex to rgb
+	result = result.map(component => parseInt(component, 16))
+	return 'RGB ' + result.toString();
+}
+
+//function that recognises hex and rgb format
+const convertHexRgb = (value)=> {
+	if (value.includes(",")) {
+		var array = value.split(",");
+		return rgb2hex(array);
+
+	} else {
+		return hex2rgb(value);
+
+	}
+}
+
+convertHexRgb('FF0000');