using the digits 1,5,2,8,four digit numbers are formed and sum of all possible four digit numbers are?

• the no of four digits numbers that can b formed =4!=24
  1528,1582,1852,1825,1258,1285....so by tis we can observe each no wil appear 6 times in unit place,6 times in 10s place and so on....(1*6)+(5*6)+(2*6)+(8*6)=96 ...so 96*1+96*10+96*100+96*1000=106656
• 11 years agoHelpfull: Yes(134) No(3)
• 4 digits so 1111
  and 4 digits so (4-1)!
  and sum of given digits=16
  
  so the answer is (1111) * (3!) * (16) = 106656
  
  general formula is
  if n digits are there: (n-1)! * (1111..n times) *(sum of given digits)
• 10 years agoHelpfull: Yes(30) No(1)
• 1258
  1285
  1528
  1582
  1825
  1852
  2158
  2185
  2518
  2581
  2815
  2851
  5128
  5182
  5218
  5281
  5812
  5821
  8125
  8152
  8215
  8251
  8512
  8521
  sum of all possible 4 digit numbers = 106656
• 11 years agoHelpfull: Yes(12) No(11)
• There are 24 numbers and the sum is 106,656.
  
  1258
  1285
  1528
  1582
  1825
  1852
  2158
  2185
  2518
  2581
  2815
  2851
  5128
  5182
  5218
  5281
  5812
  5821
  8125
  8152
  8215
  8251
  8512
  8521
• 11 years agoHelpfull: Yes(1) No(8)
• (1+5+2+8)*(4-1)!*(10^4-1)/(10-1)=106656 its the short cut method
• 10 years agoHelpfull: Yes(1) No(2)
• THERE IS A EASIEST WAY : 1,5,2,8
  so,totally 4 digits =4! =24
  and there are also 4 numbers now 24/4=6
  1*6=6
  5*6=30
  2*6=12
  8*6=48
  so total it 6+30+12+48==96
  so now the sum of all possible ways are 1 5 2 8
  1 5 2 8
  ......................
  so till 24 times u should repeat 1 0 6 6 6 5 6 just put that 96 9 will be the carry then
  add that 9 with 96 =9+96=105
  5 will be placed down and 10 will be the carry
  now do 10+96==106 6 will be placed and 10
  will be carry again do 10+96 == 106 and same
  as etc........
  
  THIS IS APPLICABLE FOR ALL KINDS OF SUMS LIKE THIS.
• 5 years agoHelpfull: Yes(1) No(1)
• 1528+5128+2158+8152+5281+2581+2851+8251+5218+2518+2815+8215+5821+8521+2185+8125=79348
• 11 years agoHelpfull: Yes(0) No(18)
• this is lengthy so easy way is fix one no in msb like 1 and remaining nos should be in 3! ways so as with remaining nos the total arrange ment will be 24 and the sum will be 106656
• 10 years agoHelpfull: Yes(0) No(4)
• possible four digits numbers are 1258,1285,1528,1582,.......8521
  sum of the possible four digit numbers are 120681
• 8 years agoHelpfull: Yes(0) No(1)