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To do these problems think of four boxes, where each box represents a digit.
In the first box, you can only have 1-9, excluding 7 (1, 2, 3, 4, 5, 6, 8, 9), that's 8 numbers. Basically, it's the same as the next three boxes, except zero is also excluded.
In the second, third, and forth boxes, you can have 0-9, excluding 7, which is 9 numbers.
To find the answer, multiply the possibilities by each other.
"Box 1" x "Box 2" x "Box 3" x "Box 4"
8 x 9 x 9 x 9 = 81 x 72 = 5832 possibilities
The answer is 5832 possibilities.
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How many odd integers are there from 1000 through 9999?
From 1000 to 9999 (inclusive) there are 9999 - 1000 + 1 = 9000 integers. Half of which are even, half of which are odd. So the answer is 9000/2 = 4,500.
How many integers are between 1000 and 10000?
9000 integers.
How many integers between 1 and 1000 are the product of two consecutive integers?
31.how do you solve?
How many integers between 1 and 1000 inclusive are divisible by 6 or 21 but not by 7?
Oh, dude, let me break it down for you. So, first, you find how many numbers are divisible by 6, which is 166. Then you find how many are divisible by 21, which is 47. But wait, don't forget to subtract the ones divisible by both 6 and 21, which is 7. So, the total is 166 + 47 - 7 = 206 integers that fit the bill. Easy peasy!
How many integers between 100 and 1000 are multiples of 7?
128!
How many positive integers between 1000 and 9999 inclusive a are divisible by 9?
There are 1,000 positive integers between 1,000 and 9,999, inclusive, that are divisible by nine.
How many integers between 1000 and 9999 inclusive does the digit 3 occur?
There are 3168 such numbers.
How many integers between 1 to 1000 both inclusive can be expressed as the difference of squares of two non negative integers?
750
What is the sum from 1000 positive integers to 1100?
The sum of the positive integers from 1,000 to 1,100 inclusive is: 106,050
How many odd integers are there from 1000 through 9999?
From 1000 to 9999 (inclusive) there are 9999 - 1000 + 1 = 9000 integers. Half of which are even, half of which are odd. So the answer is 9000/2 = 4,500.
How many integers between 1000 and 9999 are divisible by 5 or 7?
There are 2828 integers between 1000 and 9999.
How many integers are between 1000 and 10000?
9000 integers.
How many zeros are there between 1000 and 10000?
There are 2704 of them between 1000 and 10000 inclusive.
How many integers from 100 to 1000 contain NO repeated digits?
648
How many integers between 1 and 1000 are the products of two consecutive integers?
There are 30 such integers.
How many integers are there between 1 and 1000 are divisible by 3?
333 integers.
How many positive integers from 1 to 1000 inclusive are there such that is a multiple of 3 and the digit sum of is also a multiple of 3?
All multiples of 3 have digits that add up to a multiple of 3. There are 333 multiples of 3 between 1 and 1000.
