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How many 4 number combinations are there in numbers 1 to 18?
There are 18C4 = 18!/[18-4)!4!] = 18*17*16*15/(4*3*2*1) = 3060 combinations.
How did the multiplication combinationsyou wrote for 12 18 21 help you find some cominations for 120 180 210?
To answer this question you need to start with the "... combinations you wrote for 12, 18 and 21". Notice that the numbers in the second set are each 10 times the numbers in the first set. Combinations for numbers in the second set can be found by adding "*10" or "*5*2" to the combinations for the first set. You could also say: 12 = 2*2*3; 120 = 2*2*3*5*2 = 4*15*2, and many other variations on this theme.
What set does 18 belong to?
The set of even numbers
How many combinations can come from 24 numbers?
It depends how many numbers are in your combinations: 0 or 24 there is 1 1 or 23 there are 24 2 or 22 there are 276 3 or 21 there are 2,024 4 or 20 there are 10,626 5 or 19 there are 42,504 6 or 18 there are 134,596 7 or 17 there are 346,104 8 or 16 there are 735,471 9 or 15 there are 1,307,504 10 or 14 there are 1,961,256 11 or 13 there are 2,496,144 12 there are 2,704,156 If by combinations you do not mean the mathematical selection of a subset of items from a set of items (where the order doesn't matter) but how many ways are there of arranging 24 numbers then there are: 24! = 620,448,401,733,239,439,360,000 ways.
What two numbers add to 84?
there are many combinations of numbers that add up to 84. Some examples are 41+43, 35+49, 29+55, 24+61, and 18+66.
How many number combinations to equal 18?
121
How many combinations can it be for 2 types of breads 3 meats and 3 drinks?
233 = 18 combinations.
What are the three even numbers add up to 54?
18. 18 x 3 = 54. However, since the question asks for even numbers, many other combinations would qualify (e.g. 40 + 8 + 6, 32 + 12 = 10).
Which set of numbers has an LCM of 36?
12 and 18
How many combinations of three numbers can be made from the numbers 1-19 for example 2-5-13 or 18-15-4 etc using each digit only once per combination?
The first number has 19 possibilities. The second has 18, and the third only 17. 19x18x17=5814 possible lock combinations. (If you could repeat, it would be 19x19x19=6859)
What three prime numbers equal 18?
Three possible combinations: 17+1, 13+5 and 7+11.
How many 4 different numbers of combination can you get from number1-20?
There are 4845 combinations of 4 numbers from the set 1 - 20 nCr = n!/r!(n-r)! ⇒ 20C4 = 20!/4!(20-4)! = 20 x 19 x 18 x 17/4 x 3 x 2 x 1 = 4845
