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How many 3-digit positive integers have digits have a product of 24?
Wiki User
∙ 16y ago
-21
Tavares Cole
Wiki User
∙ 16y agoHow many ways can 3 digits be combined to multiply out to 24?
1 x 3 x 8 - 1 x 4 x 6 - 2 x 2 x 6 - 2 x 3 x 4
Each of these can be combined in a 6 different ways:
1 x 3 x 8 - 1 x 8 x 3 - 3 x 1 x 8 - 3 x 8 x 1 - 8 x 3 x 1 - 8 x 1 x 3
1 x 4 x 6 - 1 x 6 x 4 - 4 x 1 x 6 - 4 x 6 x 1 - 6 x 1 x 4 - 6 x 4 x 1
2 x 2 x 6 - 2 x 6 x 2 - 6 x 2 x 2 (the other three are repeats)
2 x 3 x 4 - 2 x 4 x 3 - 3 x 2 x 4 - 3 x 4 x 2 - 4 x 2 x 3 - 4 x 3 x 2
So we have 21 different numbers whose digits multiply out to 24:
138, 183, 318, 381, 813 and 831
146, 164, 416, 461, 614 and 641
226, 262 and 622
234, 243, 324, 342, 423 and 432
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How many 3 digit positive integers have 5 as the product of their digits?
Three of them.
How many three-digit positive integers have digits whose product is 24?
There are 21.
What percentage of the first 100 positive integers contains no even digits?
50%
How many positive integers less than 100 have the sum of their digits equal to a perfect square?
There are 20.
What is a bijective numeration?
A bijective numeration is a numeral system which uses digits to establish a bijection between finite strings and the positive integers.
What is thesmallest 3digit number with unique digits?
0.12 Or 102 if you do not want to include non integers.
How many 3 digit positive integers have 5 as the product of their digits?
Three of them.
How many three-digit positive integers have digits whose product is 24?
There are 21.
What is the sum of all positive integers less than 100 that have the product of their digits equal to 4?
81
What is the sum of all the digits of all the positive integers that are less than 100?
The sum of all the digits of all the positive integers that are less than 100 is 4,950.
What is the sum of positive six digit integers whose digits are a permutation of the digits in the number 123456?
279,999,720
What percentage of the first 100 positive integers contains no even digits?
50%
What are the last two digits in the sum of factorials of the first 100 positive integers?
They are 13.
How many positive integers less than 1000 have distinct digits and are even?
405
How many positive integers less than 1000 have no odd decimal digits?
52
How many positive integers ar equal to 12 times the sum of their digits?
There are none.
Using only the digits 4 5 7 8 find the greatest product and the least product possible where one factor is a 3digit number?
4 x 578 = 2312 8 x 754 = 6032
