Q. How many 4 digit no can be formed if
1)the no will be an even no
2)dey must be divisible by 4
3)no digit is repeated

• I think all these parts belong to the same question
  like=
  How many 4 digit no. can be formed if the no must be divisible by 4 no digit is repeated.
  solution:
  divisibility for 4= last 2 digit divisible by 4
  so,
  04,08,20,40,60,80 are last digits with zeroes in it
  number of such no's= (8*7*1)*6 = 336
  and
  without zero are 12,16,24,28,32,36,48,52,56,64,68,72,76,84,92,96 (no repeating digits are allowed)
  
  number of such no's=(7*7*1)*16 = 784
  now,
  total number of no's which are divisible by 4 = 336+784= 1120 ans...
• 11 years agoHelpfull: Yes(18) No(3)
• a no. divisible by 4 is always even
  last two digit should be 04,08,12,16,20,...,96 (except 44,88) (total 22)
  04,08,20,40,60,80 (6) => 6*(8*7)=336
  12,16,24,...,92,96 (16) => 16*(7*7)=784
  total number of 4 digits which divisible by 4 = 336+784= 1120
  
  
• 11 years agoHelpfull: Yes(13) No(1)
• 1) 9*10*10*5=4500
  2) ??????? don't know
  3) 9*9*8*7=4536
• 11 years agoHelpfull: Yes(6) No(16)
• answer is 1120 and how-->as you know if a number is divisible by 4 then last two digit of number must be divisible by 4 which can be 04,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96,00 but and condition is reteatition is not allowed so u have to skip 00,44,88 from above list now as all number which are divisible by four is even number so u need not to think over it. now from above list 6 combinations are those where 0 is available now as repeatition is not allowed so at unit place u can put u can use 8 remaining digit and 10th place u can put any of 7 digit which u havent used 8*7*6(as 6 combinations are dere where 0 is available) in same way for those combination where 0 is not dere u can fill unit place by 7 ways(skip 0 and two which are in use at 100 and 1000 place)*7(except those 3 which u have used at unit 100 and 1000 place) so 8*7*16(combinations)--> so finally 6*8*7+16*7*7=1120
• 11 years agoHelpfull: Yes(6) No(2)
• 1106 is the ans .
• 11 years agoHelpfull: Yes(3) No(2)
• @sugandha sagar
  all those belong to the same question
• 11 years agoHelpfull: Yes(1) No(0)
• sorry, i thought all 3 ques are different
• 11 years agoHelpfull: Yes(1) No(1)
• solve this problem through options
• 11 years agoHelpfull: Yes(0) No(1)
• this is onlyone question all of the option are its conditions
  
• 11 years agoHelpfull: Yes(0) No(2)
• getting 1106..(if repetation not allowed)
  if 0 is last digit...7*8*4=224
  if 2 is last digit...7*7*5=245
  if 4 is last digit...7*7*4=196
  if 6 is last digit...7*7*5=245
  if 8 is last digit...7*7*4=196
  total=1106
• 11 years agoHelpfull: Yes(0) No(1)
• 1)9*10*10*5
  2)9*10*5*5
  3)9*9*8*7
• 10 years agoHelpfull: Yes(0) No(0)
• 6*8*7+16*7*7=1120
• 10 years agoHelpfull: Yes(0) No(0)