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Brandon Pagac
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How many prime numbers must be multiplied to make 2400?
Three distinct prime factors, eight total.
How many 4 digit numbers can are there with distinct digits?
4,536 whole numbers or mixed numbers. 5,040 pure decimals.
How many distinct composite numbers can be formed by adding 2 of the first 5 prime numbers?
Seven of them.
How many four digit EVEN numbers have all 4 digit distinct?
2240
How many distinct 4-digit numbers have a digit sum of 7?
-3
How many numbers less than 100 have exactly nine distinct factors?
Just 36.
How many 4 number combinations using 5 numbers?
There are only 5 distinct combinations of 4 numbers.(1234, 1235, 1245, 1345, 2345) C = 5! / 4!But there are 120 distinct combinations in distinct order (i.e. 24 ways to order each abcd).abcdabdcacbdacdbadbcadcb
What is the mean of a set of numbers?
The mean is the is the total of the numbers and then dividing by how many numbers.
What is the average of the set of numbers?
It is the total sum of the numbers divided by how many there are
How many 7 distinct digit telephone numbers are there if the 1st digit may not be zero?
Nine million of them.
How many counting numbers have four distinct nonzero digits such that the sum of the four digits is 10?
1,2,3,4 1+2+3+4=10 4 times 3 times 2 times 1 =24 24 counting numbers
How many distinct positive digit integers can be formed using the digits 1 to 4 each once such that no adjacent digits differ by more then two?
Well, let's see.The number of distinct ways to order the digits 1 to 4 is 4x3x2(x1) = 24. That's not too many to list, so let's do so:123412431324134214231432213421432314234124132431312431423214324134123421412341324213423143124321The ones where 1 and 4 are next to each other are forbidden by your adjacent numbers rule. That's 2 of the numbers starting with 1 or 4 (4 total), and 4 of the numbers starting with 2 or 3 (8 total). In all, only 12 of the 24 possible numbers are allowed by the adjacent rule.
