i need help with last two

isPrime.js

@@ -0,0 +1,9 @@
+function isPrime(n) {
+	for (var i = 2; i <= Math.sqrt(n); i+=1) {
+      if (n%i===0) {
+		return false;
+	}
+   }
+   return true;
+}
+console.log(isPrime(64));

letterCount.js

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+var myString = "California";
+var splits = myString.split("");
+
+//had trouble with this sort of problem in a previous homework assignment
+console.log(splits);

merge.js

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+var arr1 = [3,6,11];
+var arr2 = [2,4,5,8,9];
+
+var arr1arr2 = arr1.concat(arr2);
+var newarr1arr2 = arr1arr2.sort();
+
+
+//Not sure how to change it so it ends with 11 instead.
+console.log(newarr1arr2[0]);

numSquare.js

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+var maxNum = 200;
+var newArray = [];
+
+var numSquare = function (maxNum) {
+	for (var i = 0; i <= maxNum; i++) {
+		if (i * i <= maxNum) {
+			var squared = i * i;
+			newArray.push(squared);
+		}
+	}
+	return newArray;
+}
+
+
+console.log(numSquare(maxNum));

primes.js

@@ -0,0 +1,20 @@
+function isPrime(n) {
+	for (var i = 2; i <= Math.sqrt(n); i+=1) {
+      if (n%i===0) {
+		return false;
+	}
+   }
+   return true;
+};
+
+function primes(maxNum) {
+	var newArray = [];
+	for (var i = 2; i <= maxNum; i+=1) {
+		if (isPrime(i) === true) { 
+		newArray.push(i);
+
+		}
+	}
+    return newArray;
+}
+console.log(primes(100));

sillySumarr.js

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+var number = [1,2,3,4,5]
+
+var sillySum = function (x) {
+	var count = 0;
+	for (var i = 0; i < number.length; i = i + 1) {
+		count += (number[i]*i)
+	}
+	console.log(count)
+};
+
+sillySum(number)