How many numbers are there between 100 and 1000 such that atleast one of their digits is 6?

• numbers between 100 and 1000 = 900
  numbers between 100 and 1000 which do not have digit 6 in any place = 8 x 9 x 9 = 648
  Unit digit could take any value of the 9 values (0 to 9, except 6)
  Tens Digit could take any value of the 9 values (0 to 9, except 6)
  Hundreds digit could take any value of the 8 values (1 to 9, except 6)
  
  therefore
  numbers between 100 and 1000 which have atleast one digit as 6 = 900 - 648 = 252
  
• 13 years agoHelpfull: Yes(103) No(14)
• 100 to 200 there are 19 '6' available..
  ex:
  106,116,126,136,146,156,160,161,162,163,164,165,166,167,168,169,176,,186,196.
  so, for 100 to 599 there are 5*19=95
  600 to 699 - 100 '6' are available. *
  and finally 700 to 1000 3*19=57.
  Hence the Answer: 95+100+57=252
  
• 13 years agoHelpfull: Yes(45) No(8)
• 106,116,126,136,146,156,166,176,186,196 there are 10 numbers
  similarly 206,216........296 there are 10 numbers
  306,316........396 there are 10 numbers
  406,416........496 there are 10 numbers
  506,516........596 there are 10 numbers
  706,716........796 there are 10 numbers
  806,816........896 there are 10 numbers
  906,916........996 there are 10 numbers totally there are 80 numbers
  from 600 1o 669 there are 100 numbers so answer is 180
• 13 years agoHelpfull: Yes(4) No(47)
• the numbers having 6 in hundreds place=99
  the numbers that have 6 in tens place=9p2=72(we can fill other places with digits with 0to9)
  the numbers that 6in ones place=9p2=72(this also we can fill with digits 0to9)
  so the numbers between 100to1000 such that atleast one of their digits is 6=
  99+72+72=243
• 13 years agoHelpfull: Yes(1) No(16)
• 100 to 200 there are 20 '6' available..
  ex:
  106,116,126,136,146,156,160,161,162,163,164,165,166,167,168,169,176,,186,196.
  so, for 100 to 599 there are 5*20=100
  600 to 699 - 100 '6' are available=120
  and finally 700 to 1000 3*20=60.
  Hence the Answer: 100+120+60=280
• 8 years agoHelpfull: Yes(1) No(1)
• Hi.. If any one have IBM GTS question paper, then plz send to me......neelchandra93@gmail.com..Thanks..
• 7 years agoHelpfull: Yes(0) No(0)