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There are 9 1-digit numbers and 16-2 digit numbers. So a 5 digit combination is obtained as:
- Five 1-digit numbers and no 2-digit numbers: 126 combinations
- Three 1-digit numbers and one 2-digit number: 1344 combinations
- One 1-digit numbers and two 2-digit numbers: 1080 combinations
This scheme does not differentiate between {13, 24, 5} and {1, 2, 3, 4, 5}. Adjusting for that would complicate the calculation considerably and reduce the number of combinations.
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If you have 25 beads how many 3 digit numbers can be formed if you use all the 25 beads in an abacus?
6
How many numbers consisting of two digits can be formed from 2 3 5 7 IF Each integer is to be used only once?
The sum you require is 4!/2!2!, which is 6. This means there are 6 different two-digit numbers. * * * * * Wrong! The above formula is for the number of combinations, not permutations. However, since the number 23 is different from the number 32, you require permutations and not combinations. There are 4*3 = 12 23, 25, 27, 32, 35, 37, 52, 53, 57, 72, 73, 75.
How many 3 letter combinations?
17,576 possible combinations * * * * * Not quite! This is the total number of permutations of 3 letters out of 26. AAB is counted as being different from ABA or BAA. But these are the same combinations. Thus there are 26 combinations of just one letter. 26*25 combinations of two letters and 26*25*24/(3*2*1) of three. In all, that makes 26 + 650 + 2600 = 3276
What is a 25 digit number called?
quadrillion
How do you arrange numbers in middle-digit order?
The middle mber becomes the primary. Sort by that and then sort by the numbers to the left and then the numbers to the right. Example: 12-34-56 98-76-54 11-22-33 21-25-33 23-25-33 becomes: 11-22-33 21-25-33 23-25-33 12-34-56 98-76-54 Easy Schmeezy!
How many combinations of 7 numbers in 25 numbers and what are they?
There are 480,700 combinations and I am not going to even try to list them!
How many different combinations of numbers can you make using 1 2 10 25 and 100?
Their is 25 combinations
How many five digit numbers are perfect squares?
25
How many three-digit numbers can I make on a abacus from 25 beads?
25=20,21,23
How many 3-digit numbers will be there which are divisible by 25?
-22
How many 3 digit numbers are multiples of 25?
There are 36 such numbers.There are 36 of them.
How many 2-digit even numbers have an odd number as the sum of their digits?
25 of them
If you have 25 beads how many 3 digit numbers can be formed if you use all the 25 beads in an abacus?
6
How many combinations are there with 5 numbers?
5*4*3*2*1 = 120 combinations. * * * * * No. The previous answerer has confused permutations and combinations. There are only 25 = 32 combinations including the null combinations. There is 1 combination of all 5 numbers There are 5 combinations of 4 numbers out of 5 There are 10 combinations of 3 numbers out of 5 There are 10 combinations of 2 numbers out of 5 There are 5 combinations of 1 numbers out of 5 There is 1 combination of no 5 numbers 32 in all, or 31 if you want to disallow the null combination.
How many five digit numbers can be make from 2 9 7 8 4?
25
How many two-digit numbers are there whose digit total 7?
16, 25, 34, 43, 52, 61, 70 Seven of them.
How many combinations of 8 numbers are there in 56 numbers?
Assuming you meant how many combinations can be formed by picking 8 numbers from 56 numbers, we have:(56 * 55 * 54 * 53 * 52 * 51 * 50 * 49)/8! = (7 * 11 * 3 * 53 * 13 * 51 * 25 * 7) = 1420494075 combinations. (Also equal to 57274321104000/40320)
