Q: How do you get numbers 8 9 and 12 by using four 5's?

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NO besause 5s multiples are only numbers that end with 0 and 5s so no.....!!!

i think there are 18 digit 5s.

Numbers, listed in 5s and 10s, between 40 and 60 but including both numbers are:4045505560Numbers, listed in 5s and 10s, between 40 and 60 but excluding both numbers are:455055

55 + 5/5

4x5=20 20x4=80

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NO besause 5s multiples are only numbers that end with 0 and 5s so no.....!!!

i think there are 18 digit 5s.

12

If: 5s = 33 Then: s = 33/5 = 6.6

Numbers, listed in 5s and 10s, between 40 and 60 but including both numbers are:4045505560Numbers, listed in 5s and 10s, between 40 and 60 but excluding both numbers are:455055

55 + 5/5

For every pair of 5s, the other two digits can be filled in 2 × 1 = 2 different ways. There are 3 positions the pair of 5s can sit (first and second, second and third, or third and fourth digits) → there are 3 × 2 = 6 different possible numbers (which are: 5589, 5598, 8559, 9558, 8955, 9855)

3s has a principle quantum number of n=3 5s has a principle quantum number of n=5

To write four 5s and make them represent 56 you need to write 55 + 5/5. When worked out it becomes 55 + 1 (5/5=1) which equals 56.

There can be two electrons with those quantum numbers in an atom. Each electron is completely described by four quantum numbers. The one that's missing in the list provided is ms, which can have only two possible values (+1/2 and -1/2).

The answer is 9C4 = 9*8*7*6/(4*3*2*1) = 126 ways.

4x5=20 20x4=80