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20 objects, be they books, numbers or elephants, can be arranged in 20! different ways.
20! represents 20 factorial, ie 20 x 19 x 18 .... x 3 x 2 x 1 and is a very substantial figure of 19 digits.
In scientific notation it is 2.43290200817664 x 1018
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What is the average of first 40 natural numbers?
((1 + 40) x 20)/40 ie 20.5
How do you get the permutation of a number?
You can't get a permutation of a number, but you can get the permutation of a set of numbers. Take the set {1, 2, 3, 4, 5}. If you move the 1 over to the right 1 or 3 spaces and keep the other numbers in the same order, you have an odd permutation: {2, 1, 3, 4, 5} and {2, 3, 4, 1, 5} in this case. If you move the 1 over to the right 2 or 4 spaces, you have an even permutation: {2, 3, 1, 4, 5} and {2, 3, 4, 5, 1} in this case. If two of the numbers in the set are both oddly permutated, the set as a whole is evenly permutated, kind of like how an odd number multiplied by an odd number is an even number. For example, {2, 1, 4, 3, 5} is an even permutation. However, and I'll let you figure out why on this one, {2, 1, 4, 5, 3} is an odd permutation. There are much more formal ways to describe permutations and many different ways to write them out, as you can see by following the link below, but what I've stated above should get you started with at least a basic comprehension.
How many 5-number combinations are there for numbers 1-45?
This is a Permutation problem; nPr. This is: n!/(n-r)! or 45!/(45-5)! = 146611080.
What is the sum of counting numbers from 1 to 20?
The sum of the numbers from 1 to 20 inclusive is 220.
What are the square numbers between 1 and 20?
The square numbers between 1 and 20 are 1,4,9 and 16.
8 Sum of the numbers from 1 to 20 is?
(1 + 20) x (20/2) ie 210
How do you find the permutation?
You do not have to figure the permutation. You simply rearrange the order of the numbers that you are presented with. The permutations of the number set 1, 2, 3 include 1, 3, 2, and 2, 1, 3.
What is the average of first 40 natural numbers?
((1 + 40) x 20)/40 ie 20.5
Permutations in 20 numbers ie 1to 20?
That depends how many are taken for each permutation. If you take 1 number at a time, then there are 20 permutations. 2 at a time . . . . . (20 x 19) = 380 3 at a time . . . . . (20 x 19 x 18) = 6,840 4 at a time . . . . . (20 x 19 x 18 x 17) = 116,280 5 at a time . . . . . (20 x 19 x 18 x 17 x 16) = 1,860,480 etc.
How do you make 24 out of 7126?
One possible permutation of these numbers to make 24 is (7 + 1) / (2/6).
How do you get the permutation of a number?
You can't get a permutation of a number, but you can get the permutation of a set of numbers. Take the set {1, 2, 3, 4, 5}. If you move the 1 over to the right 1 or 3 spaces and keep the other numbers in the same order, you have an odd permutation: {2, 1, 3, 4, 5} and {2, 3, 4, 1, 5} in this case. If you move the 1 over to the right 2 or 4 spaces, you have an even permutation: {2, 3, 1, 4, 5} and {2, 3, 4, 5, 1} in this case. If two of the numbers in the set are both oddly permutated, the set as a whole is evenly permutated, kind of like how an odd number multiplied by an odd number is an even number. For example, {2, 1, 4, 3, 5} is an even permutation. However, and I'll let you figure out why on this one, {2, 1, 4, 5, 3} is an odd permutation. There are much more formal ways to describe permutations and many different ways to write them out, as you can see by following the link below, but what I've stated above should get you started with at least a basic comprehension.
How many 6 numbers combinations can you make from 170200?
Only 1, since the order of the digits does not matter in a compbination. In a permutation, yes, but not combination.
How many 5-number combinations are there for numbers 1-45?
This is a Permutation problem; nPr. This is: n!/(n-r)! or 45!/(45-5)! = 146611080.
What are Prime numbers 1-20?
These are the prime numbers 1-20 2,3,5,7,11,13,17,19
How many numbers are on a dartboard?
The numbers 1-20 are on a dart board so there are twenty numbers.
Multiplication rule combination and permutation examples?
1=1
The sum of two numbers is 21 The difference of the two numbers is19 What are the two numbers?
20 and 1. 20 + 1 = 21 20 - 1 = 19
