how many numbers between 100 and 500 are there whose sum of two digits will be equal to third?

• possible combinations are
  
  (1,1,0)=2, (2,2,0)=2, (2,1,1)=3, (3,3,0)=2, (3,2,1)=6, (4,4,0)=2, (4,3,1)=6, (4,2,2)=3, (1,5,4)=4
  (2,5,3)=4, (1,6,5)=2, (2,6,4)=4, (3,6,3)= 2, (1,7,6)= 2, (2,7,5)= 2, (3,7,4)= 4, (1,8,7)= 2,
  (2,8,6)= 2, (3,8,5)= 2, (4,8,4)= 2, (1,9,8)=2, (2,9,7)= 2 , (3,9,6)= 2 , (4,9,5)= 2
  
  so total possible no.= 2+2+3+2+6+2+6+3+4+4+2+4+2+2+2+4+2+2+2+2+2+2+2+2= 66 numbers
• 10 years agoHelpfull: Yes(25) No(4)
• Ans:30
  the question he asked is
  Whose sum of first and second digits will be equal to third ( not any two digits sum is third digit)
  
  Explanation:-
  _ _ _ in first place we can fill with 4 digits(1,2,3,4)
  In second place 0-9
  In third place 1-9
  After checking for the sum 1,2,....9 in the third place
  if the sum is 1, it is 101
  If the sum is 2, it is 112,202
  For 3, it is 123,213,303
  For 4 to 9 we get 4 possibilities
  
  Total = 1+2+3+4+4+4+4+4+4 = 30
  
  
  
• 10 years agoHelpfull: Yes(6) No(9)
• May 28 Will be Correct Answer
• 10 years agoHelpfull: Yes(5) No(8)
• Ans:
  in 100 : 101,112,123,134,145,156,167,178,189,
  In 200: 202,213,224,235,246,257,268,279
  300 ; 303,314,325,336,347,358,369,
  400 ; 404,415,426,437,448,459
  So Ans is 30..
• 10 years agoHelpfull: Yes(5) No(6)
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• 10 years agoHelpfull: Yes(1) No(1)
• i think 24 is the correct answer
• 10 years agoHelpfull: Yes(1) No(2)
• Ans: 32
  Explanation:-
  First we will take 100 to 200 (according to question here it is not specify that sum of any two digit ) so
  112,123,134,145,..........189 = total 8 numbers
  like that from 100 to 500 only 32 numbers will be their.
• 10 years agoHelpfull: Yes(0) No(7)
• possible combinations are
  (1,1,0), (2,2,0), (2,1,1), (3,3,0), (3,2,1), (4,4,0), (4,3,1), (4,2,2)
  and the permutation= 2+2+3+2+6+2+6+3= 26
  
  so total no= 26
• 10 years agoHelpfull: Yes(0) No(4)
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• 9 years agoHelpfull: Yes(0) No(0)
• 112,123,134,145,156,167,178,189=8
  213,224,235,246,257,268,279=7
  314,325,336,347,358,369=6
  415,426,437,448,459=5.
  i-e 5+6+7+8=26.
• 9 years agoHelpfull: Yes(0) No(1)