Rich chooses a 4-digit positive

  1. Rich chooses a 4-digit positive integer. He erases one of the digits of this integer. Theremaining digits, in their original
    1. answers icon 0 answers
    2. Zayan asked by Zayan
    3. views icon 1,081 views
  2. John chooses a 5-digit positive integer and deletes one of its digits to make a 4-digit number. The sum of this 4-digit number
    1. answers icon 9 answers
    2. Amitabha asked by Amitabha
    3. views icon 4,641 views
  3. Billy chooses three dfferent non-zero digits and makes six different 3-digit numbers with no digit repeated in any number. He
    1. answers icon 3 answers
    2. mariana asked by mariana
    3. views icon 608 views
  4. Find the sum of all 3-digit positive numbers N that satisfy the condition that the digit sum of N is 3 times the digit sum of
    1. answers icon 5 answers
    2. rohit asked by rohit
    3. views icon 1,395 views
  5. From the digits 1, 2, 3, and 4, how many positive integers are less than 100,000? Consider the possibilities for 5-digit,
    1. answers icon 1 answer
    2. Sebastian asked by Sebastian
    3. views icon 1,275 views
  6. Find a three-digit positive integers such that the sum of all three digit is i4, the tens digit is two more than ones and if the
    1. answers icon 1 answer
    2. Maria Christina asked by Maria Christina
    3. views icon 926 views
  7. Don chooses a positive integer less than 11 which he calls a and an integer b such that 11<=b<=20. He adds all the positive
    1. answers icon 2 answers
    2. Lone asked by Lone
    3. views icon 501 views
  8. For every positive 2-digit number, x, with tens digit t and units digit u , let y be the 2 digit number formed by reversing the
    1. answers icon 0 answers
    2. reena asked by reena
    3. views icon 970 views
  9. How many positive four-digit integers $N$ have the property that the three-digit number obtained by removing the leftmost digit
    1. answers icon 1 answer
    2. Lily asked by Lily
    3. views icon 82 views
  10. If you have the sume of squares of the digits of a positive two-digit number is 20, the tens digit is 2 more than the units
    1. answers icon 2 answers
    2. Joey asked by Joey
    3. views icon 483 views