You, can't.
> 6.40237371 × 1015Actually, since there are four i's and two o's, the number of distinct permutations of the letters in "oversimplification" is 18!/(4!2!) = 133,382,785,536,000.
The number of ways is 18C5 = 18!/(5!*13!) = 8,568 ways.
if order of beads matters than you get 18P12= 8.892185702*1012. if order doesn't matter than it's 18C12= 18564 ways to arrange the beads.
It depends on what currency - and therefore the choice of coins. In the UK, for example, there is a 20 p coin but no 25 p whereas in the US there is no 20 c but there is a 25 c coin.
You, can't.
18
Assuming you want a rectangular array, 1 x 18, 2 x 9, or 3 x 6.
Think of the chairs as arrays. The dimensions of the arrays give you the factors of 18.
18 Chairs into equal rows - 6 x 3 2 x 9 18 x 1
> 6.40237371 × 1015Actually, since there are four i's and two o's, the number of distinct permutations of the letters in "oversimplification" is 18!/(4!2!) = 133,382,785,536,000.
18
You can have: 1 row of 36 2 rows of 18 3 rows of 12 4 rows of 9 or 6 rows of 6, so in total there are 5 ways.
18
The number of ways is 18C5 = 18!/(5!*13!) = 8,568 ways.
if order of beads matters than you get 18P12= 8.892185702*1012. if order doesn't matter than it's 18C12= 18564 ways to arrange the beads.
18 5p coins make 90p.