diff --git a/bit_manipulation/convert_any_base.py b/bit_manipulation/convert_any_base.py
new file mode 100644
index 0000000..8e539a9
--- /dev/null
+++ b/bit_manipulation/convert_any_base.py
@@ -0,0 +1,16 @@
+def convert_to_any_base(base: int, num: int) -> str:
+        
+        if num == 0:
+            return "0"
+    
+        n = abs(num)
+        result = ""
+        
+        while n:
+            result += str(n % base)
+            n //= base
+        
+        if num < 0: 
+            result += '-'
+            
+        return  result[::-1]
diff --git a/bit_manipulation/convert_to_hex.py b/bit_manipulation/convert_to_hex.py
new file mode 100644
index 0000000..84b4de6
--- /dev/null
+++ b/bit_manipulation/convert_to_hex.py
@@ -0,0 +1,18 @@
+def convert_to_hex(num: int) -> str:
+      
+  hex_chars  = "0123456789abcdef"
+  size = 32
+  base = 16
+        
+  if num == 0:
+    return "0"
+        
+  if num < 1:
+    num += 2**size
+        
+  result = ""
+  while num:
+    result += hex_chars[num % base]
+    num //= base
+            
+  return result[::-1]
diff --git a/bit_manipulation/count_1s.py b/bit_manipulation/count_1s.py
new file mode 100644
index 0000000..5b5862b
--- /dev/null
+++ b/bit_manipulation/count_1s.py
@@ -0,0 +1,12 @@
+def count_ones(n: int) -> int:
+        
+        counter = 0
+        
+        while n:
+            
+            if n & 1:
+                counter += 1
+            
+            n >>= 1
+        
+        return counter
diff --git a/bit_manipulation/reverse_bits.py b/bit_manipulation/reverse_bits.py
new file mode 100644
index 0000000..14f68f8
--- /dev/null
+++ b/bit_manipulation/reverse_bits.py
@@ -0,0 +1,10 @@
+def reverse_bits(n: int) -> int:
+        
+        result, base = 0, 31
+        
+        while n:
+            result += (n & 1) << base
+            n >>= 1
+            base -= 1
+        
+        return result
diff --git a/bit_manipulation/sum_with_bitwise.py b/bit_manipulation/sum_with_bitwise.py
new file mode 100644
index 0000000..282fe8b
--- /dev/null
+++ b/bit_manipulation/sum_with_bitwise.py
@@ -0,0 +1,17 @@
+def get_sum(self, a: int, b: int) -> int:
+        
+       if a == -b:
+            return 0
+        
+       if abs(a) > abs(b):
+            a, b = b, a
+            
+       if a < 0:
+            return - get_sum(-a, -b)
+        
+       while b:
+            
+            c = a & b
+            a, b = a ^ b, c << 1
+            
+       return a