If all the numbers between 11 and 100 are written on a piece of paper. How many times will the number 4 be used?

• Answer is 19 only beacause 44 is counted twice
• 10 years agoHelpfull: Yes(36) No(6)
• 19, every word can only be appeared 20 times from 1 to 100. nd it is starting from 11, so 19 times used...
• 10 years agoHelpfull: Yes(14) No(2)
• ans : 19
  There are total 9 4's in 14, 24, 34...,94
  & total 10 4's in 40,41,42....49
  thus, 9+10=19...
• 10 years agoHelpfull: Yes(8) No(1)
• ans is::19
• 10 years agoHelpfull: Yes(7) No(7)
• ans is 18
  14,24,34,40,41,42,43,44,45,46,47,48,49,54,64,74,84,94.
• 10 years agoHelpfull: Yes(7) No(22)
• 19 is correct ans
• 10 years agoHelpfull: Yes(7) No(4)
• sorry guys its 18
• 10 years agoHelpfull: Yes(5) No(20)
• THE NUMBER OF 4'S[CONSIDERING THE SINGLE OCCURENCE OF 4] IN THE RANGE 40-49 IS 10
  THEN CONSIDER THE NUMBERS 14,24,34,44,54,64,74,84,94=9... SO TOTALLY 19...
  
• 10 years agoHelpfull: Yes(5) No(3)
• ANSWER:18
  14,24,34,40,41,42,43,44,45,46,47,48,49,54,64,74,84,94
• 10 years agoHelpfull: Yes(2) No(6)
• 19 is correct one
• 10 years agoHelpfull: Yes(2) No(2)
• You are Welcome Mills :)
• 10 years agoHelpfull: Yes(1) No(2)
• between 7 and 100
  14,24,34,54,64,74,84,94=8 times
  40,41,42,43,44,45,46,47,48,49=10 times, Here 44 will be counted another times
  so 11 times.
  
  8+11=19 times
  
• 9 years agoHelpfull: Yes(1) No(1)
• 18 is the correct ans
• 9 years agoHelpfull: Yes(1) No(2)
• total no. of words from 11 to 100 is 90
  probablity of getting 4 at first position is 1/9
  probablity of getting 4 at last position is 1/10
  no. of fours = (1/9)*90 + (1/10)*90 = 19.
  
• 8 years agoHelpfull: Yes(1) No(1)
• 14,24,34,40,41,42,43,44,45,46,47,48,49,54,64,74,84,94------>19
  
  note:-> hear 44 have two no of 4's
• 5 years agoHelpfull: Yes(1) No(1)
• Ans is 19
  Consider the range from 12 to 99
  Probability of getting 4 at Ones place is : 9c1*1c1 = 9*1 = 9
  Probability o getting 4 at Tens place is : 1c1*8c1 = 1* 8 =8
  Sum = 9+8 =17
  Now consider the case of 44
  Probability of getting 44 = 2! =2*1=2
  So; Total = 17+2
  =19
• 5 years agoHelpfull: Yes(1) No(0)
• thank you tanu.. now i understood it properly
• 10 years agoHelpfull: Yes(0) No(0)
• 19
  14,24,34,40,41,42,43,44,45,46,47,48,49,54,64,74,84,94
• 10 years agoHelpfull: Yes(0) No(1)
• no. of 4 used in 11 to 100 is 19...
• 10 years agoHelpfull: Yes(0) No(2)
• ans 19
  first count 4 in unit plac
  then in tens place
• 8 years agoHelpfull: Yes(0) No(1)
• 19 times is correct ans
• 8 years agoHelpfull: Yes(0) No(1)
• 19 is correct answer because, if we divide 11 to 100 in some section like 11 to 19, 20 to 29 ..... 90 to 99 except 40 to 49 there are total 8 4 coming and the very imp section i.e 40 to 49 contains 11 4 so 19 is the correct answer .
• 8 years agoHelpfull: Yes(0) No(1)
• 18 because for 11 to 100 in each row there is a 4 but in 44 there is two 4 so (14,24,34,44,54,64,74,84,94) a total of 10 4's and also in the row(41,42,43,45,46,47,48,49) a total of 8 4's.
  so total 10+8=18.
• 8 years agoHelpfull: Yes(0) No(2)
• Answr : 18
  let us take _ _ two digit number
  let fix the unit's place to 4 such as _ 4 then to fill ten's digit we can have 9 ways exlcuding 0 because given range is 11 to 100
  now consider 4 in ten's digit it will be 4 _ here there are 10 ways of filling
  total no. of 4 in btwn 11 to 100 is (9+10)-1
  because as 44 will occur in both cases
  thus total number of 4's is 18.
• 8 years agoHelpfull: Yes(0) No(2)
• answer is 19 because 44 is counted twice
• 7 Months agoHelpfull: Yes(0) No(0)