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How many 4-digit falling numbers

How many 4-digit falling numbers can we make from decimal digits? (A falling number is a positive integer where each digit is
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2. asked by picklepeter
3. 579 views
Find the number of five digit numbers less than 40,000 in which the 33 digit numbers formed by consecutive digits are all
1. 1 answer
2. 99 views
the hundred thousands digit of a six-digit even numbers is 3 more than the thousand digit,which is twice the ones digit.give at
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2. asked by louie
3. 737 views
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
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2. asked by rohit
3. 1,457 views
A 4-digit number is selected from the numbers {1,2,3,4,5,6} where the digits are selected without replacement.How many 4-digit
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2. asked by Carrie
3. 771 views
The number uses every number 0-9 the numbers are used only once the fourth digit is 4 the first digit in the billions place is 3
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2. asked by Anonymous
3. 1,309 views
How many international direct-dialing numbers are possible if each number consists of a four-digit area code (the first digit of
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2. asked by Kal Jay
3. 1,870 views
How many different three-digit numbers can be written using the digits 4, 5, 6, and 7? Use each digit only once in a number.Is
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2. asked by Tony
3. 857 views
Find the number of five-digit numbers less than 40 000 in which the three three-digit numbers formed by consecutive digits are
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2. asked by Livi
3. 170 views
MathIn a 3 digit number the hundreds digit is one half of tens digit while the ones digit is more than the tens digit. If the
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2. asked by Jenny Rose
3. 1,278 views