day 20 is updated

Author: darkprinx

Status/Day_20.md

@@ -3,7 +3,7 @@
 
 ### **Question**
 
->***Please write a program to print the list after removing delete even numbers in [5,6,77,45,22,12,24].***
+>***Please write a program to print the list after removing even numbers in [5,6,77,45,22,12,24].***
 
 
 ----------------------
@@ -21,18 +21,27 @@ print li
 ----------------
 **My Solution: Python 3**
 ```python
-#to be written
+def isEven(n):
+    return n%2!=0
 
+li = [5,6,77,45,22,12,24]
+lst = list(filter(isEven,li))
+print(lst)
+```
+**OR**
+```python
+li = [5,6,77,45,22,12,24]
+lst = list(filter(lambda n:n%2!=0,li))
+print(lst)
 ```
 ---------------------
 
 
-
 # Question 81
 
 ### **Question**
 
->***By using list comprehension, please write a program to print the list after removing delete numbers which are divisible by 5 and 7 in [12,24,35,70,88,120,155].***
+>***By using list comprehension, please write a program to print the list after removing numbers which are divisible by 5 and 7 in [12,24,35,70,88,120,155].***
 
 ----------------------
 ### Hints 
@@ -49,8 +58,9 @@ print li
 ----------------
 **My Solution: Python 3**
 ```python
-#to be written
-
+li = [12,24,35,70,88,120,155]
+li = [x for x in li if x % 35!=0]
+print(li)
 ```
 ---------------------
 
@@ -77,8 +87,9 @@ print li
 ----------------
 **My Solution: Python 3**
 ```python
-#to be written
-
+li = [12,24,35,70,88,120,155]
+li = [li[i] for i in range(len(li)) if i%2 != 0]
+print(li)
 ```
 ---------------------
 
@@ -87,7 +98,7 @@ print li
 
 ### **Question**
 
->***By using list comprehension, please write a program to print the list after removing the 0th, 2nd, 4th,6th numbers in [12,24,35,70,88,120,155].***
+>***By using list comprehension, please write a program to print the list after removing the 2nd - 4th numbers in [12,24,35,70,88,120,155].***
 
 ----------------------
 ### Hints 
@@ -100,15 +111,17 @@ Use enumerate() to get (index, value) tuple.***
 ```python
 
 li = [12,24,35,70,88,120,155]
-li = [x for (i,x) in enumerate(li) if i%2!=0]
+li = [x for (i,x) in enumerate(li) if i<3 or 4<i]
 print li
 
 ```
 ----------------
 **My Solution: Python 3**
 ```python
 #to be written
-
+li = [12,24,35,70,88,120,155]
+li = [li[i] for i in range(len(li)) if i<3 or 4<i]
+print(li)
 ```
 ---------------------
 
@@ -127,18 +140,9 @@ print li
 
 ----------------------
 
-**Main author's Solution: Python 2**
+**Solution:**
 ```python
-
 array = [[ [0 for col in range(8)] for col in range(5)] for row in range(3)]
 print array
 ```
 ----------------
-**My Solution: Python 3**
-```python
-#to be written
-
-```
----------------------
-
-