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The number of 6-digit even numbers that can be made from the number 214635 are:

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The number of 6-digit even numbers that can be made from the number 214635 are:  a) 18 b) 72  c) 120 d) 360 Answer:  D from the question we can see we have to form 6 digit number(no repetition) so, let us six blanks as show below : _ _ _ _ _ _  if the number has to be even it has to be end with even number. 214635   from the above digits even numbers are 2,4,6 so, the units digit is 2 or 4 or 6 so, the no.of.ways is 3 remaining 5 digits can be filled with 5! ways  so, the answer is 5!x3 ways                             = 360 ways  remaini
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Python program to check whether the PIN entered by the user is four digit number or not

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  Algorithm  Step 1 : start Step 2: declare a string  Step 3: return the length of list by using len function  Step 4 : check the len == 4 then print " user has entered four digit pin " if not print " invalid number of digits "  Program :  pin = input(" enter the pin : " ) i = len(pin)  if  i == 4:   print("user has entered four digit pin ") else:   print(" invalid number of digits")
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Python tupes

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 Hello friends, today we are going to dicuss about   tuples  . It is one of the data type in python . Take a look at  before blog  Previous . Table of contents  Tuples  And its Operations First,let's try to learn the syntax of the tuples  A = (var1 , var2 , var3 , var4 .........) Here,  A is name of the tuple  var1 ,var2, var3 ... are elemnts in the tuple. The biggest advantage in the tuples is you have amy any yype of values(string , int, float ) in one tuple. tup = ("apples", "pineapple ",1,7,5) In the above  video I told tuples are immutable (cannot be updated ) . Try lets try to update it, how does python teacts .   Indexing tup = ("apple", "pineapples",1,7 ,5) tup[0] # accessing index 0 element  tup[3] # accessing index 3 element  Slicing  : tup = ("apples","pineapple",1,7,5) tup[0:3] Operations       Concatenation   tup = ("apples","pineapple",1,7,5) tup2 = (3,2,8) tup + tup2  ...
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Python dictonaries

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  Good day !!          Hello guys , have a recap at my previous blog . I have explained about tuples.  Previous Context of blogs DICTIONARIES  Operations  Accessing  Updating  Deleting  Length            Today we are  going to learn about dictionaries in python . As we have got many data types(lists , tuples  ... ) why still we are using dictionaries , right ?    You will have a clear idea at the end of this blog . Let's start now !!  Let me explain the disadvantages of list First . In list we cannot access the two different variables at a time . Warch this video for explanation.  Dictionaries        Dictionaries are very unique to other data types . It should be embedded in curly parenthesis "{}". It has two sections one is key and value pair . Dictionaries works  on key-value pair .  Syntax  dict = {k1 : v1 , k2 : v2 , ....... } Key...
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If the sum of 4 times a number A and three times a number B is equal to the sum of number B and seven times the number A, then what is the value of A:B? | CTS previous Aptitude question

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 If the sum of 4 times a number A and three times a number B is equal to the sum of number B and seven times the number A, then what is the value of A:B? ( CTS Aptitude question) Options:  a) 2:3 b) 3:2 c) 4:3 d) 3:4 Answer : A The above question can be written in below form  4A + 3B = B + 7A 4A - 7B = B - 3B -3A  = -2B hence the answer is A:B = 2:3 
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