Q: How many seven digit numbers are there when 0 and 4 cannot be the leading number?

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The leading digit in a number is the digit to the most left. EXAMPLES: 1.09 the leading digit is 1. 298 leading digit 2.

A leading digit is the digit/number at the beggining of a decimal number or regular number and is the first number to the left.

There is a choice of 8 digits for the first digit and a choice of 10 digits for each of the remaining 6, so there are 8 x 106 = 8,000,000 (eight million) 7-digit numbers which do not start with 0 or 4.

"Sum" requires at least two numbers. So there cannot be athree digit number that sums to anything.

It is the leading digit.

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There are 9 x 10 x 10 x 10, or 9000 four-digit number that can be formed if the leading digit cannot be zero.

There are not 99999999 eight digit numbers - unless you allow numbers with leading 0s.

There are 7056 4-digit numbers with at most one of {0,2,4,6,8}, and any number of {1,3,5,7,9}. Leading 0s are not permitted.There are 7056 4-digit numbers with at most one of {0,2,4,6,8}, and any number of {1,3,5,7,9}. Leading 0s are not permitted.There are 7056 4-digit numbers with at most one of {0,2,4,6,8}, and any number of {1,3,5,7,9}. Leading 0s are not permitted.There are 7056 4-digit numbers with at most one of {0,2,4,6,8}, and any number of {1,3,5,7,9}. Leading 0s are not permitted.

The leading digit in a number is the digit to the most left. EXAMPLES: 1.09 the leading digit is 1. 298 leading digit 2.

Assuming you mean whole numbers and leading zeros do not count, the smallest 3 digit number is 100.

A three digit number cannot be divisible by a 5 digit number - in any base.

A leading digit is the digit/number at the beggining of a decimal number or regular number and is the first number to the left.

In base ten, there are 9000 four digit number, the numbers are from 1000 to 9999. If you allow leading zeros, then there are 10000 numbers. [0000 - 9999]

There is a choice of 8 digits for the first digit and a choice of 10 digits for each of the remaining 6, so there are 8 x 106 = 8,000,000 (eight million) 7-digit numbers which do not start with 0 or 4.

Assuming that the first digit of the 4 digit number cannot be 0, then there are 9 possible digits for the first of the four. Also assuming that each digit does not need to be unique, then the next three digits of the four can have 10 possible for each. That results in 9x10x10x10 = 9000 possible 4 digit numbers. If, however, you can not use the same number twice in completing the 4 digit number, and the first digit cannot be 0, then the result is 9x9x8x7 = 4536 possible 4 digit numbers. If the 4 digit number can start with 0, then there are 10,000 possible 4 digit numbers. If the 4 digit number can start with 0, and you cannot use any number twice, then the result is 10x9x8x7 = 5040 possilbe 4 digit numbers.

the leading digit

Assuming whole numbers and a leading zero does not count: 10,234,567