What is the minimum number of numbers needed to form every number from 1 to 7000
1]28 2]36 3]47 4]54

• ones place can be formed by 0-9 -10 digits
  tens place can be formed by 0-9 -10 digits
  hundred place can be formed by 0-9 -10 digits
  thousand place can be formed by 1-6 -6 digits
  total-36
• 12 years agoHelpfull: Yes(25) No(1)
• 2] 36
  0... 3 times
  1....4
  2....4
  3....4
  4 4
  5.....4
  6....4
  7....3
  8....3
  9....3
• 12 years agoHelpfull: Yes(10) No(3)
• here in 7000....we can use 0,7,8,9 only in ones,tens,hundreds places so its 4 digits(0,7,8,9)...3 places (4*3 = 12 times).
  and we can use 1,2,3,4,5,6 in all four places so its 6 digits(1,2,3,4,5,6)... 4 places (6*4= 24 times)
  12+24= 36 [ans: 2]
  
• 12 years agoHelpfull: Yes(6) No(2)
• 0,7,8,9 cannot form four times because they use four times they can above7000.that means (0000,7777,8888,9999)these are not use.so 0 can use three times only similarly 7,8,9 also use three times.and remaing 1,2,3,4,5,6 can use four times. so 0,7,8,9(total 12 times),1,2,3,4,5,6(totla 24 times)so total 12+24=36 answer.
• 12 years agoHelpfull: Yes(3) No(2)
• 36
  You will need 3 of numbers 0, 7, 8 & 9, & 4 of numbers 1-6
  
  
• 12 years agoHelpfull: Yes(0) No(3)
• plzz elaborate
• 12 years agoHelpfull: Yes(0) No(4)
• can any one explain it
• 12 years agoHelpfull: Yes(0) No(4)