# Arithmetic/Knowledge Step-By-Step Number Puzzle! (What Is The Final Answer?) [closed]

1. Start with the number of U.S. ounces in a U.S. gallon.
2. Subtract the atomic number for Samarium.
3. Add the amount of days in February on a leap year.
4. Multiply this by 6 factorial.
5. Divide this by pi rounded to the nearest whole.
6. Divide this by xx+x if x=4
7. Add xxxxxx if x=y and y = 2z and z=3
8. Multiply the amount of prime numbers under 20
10. Divide this by 1001110001000000000 in the base 10 system (It's in binary there)
12. Divide this by 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 * 3 * 5 * 5 * 5 * 5 * 5 * 5 * 5

• Hi! Welcome to Puzzling Beta! Please read help center and tour to find out more to create puzzles of high quality, and especially this post: puzzling.stackexchange.com/questions/5880/… As commented by Joe Z., this isn't so much a puzzle as it is a list of instructions. – justhalf Apr 9 '15 at 7:09
• I was going to comment that this doesn't seem much worse than this puzzle with a positive score, but in fact maybe it does. There isn't much to look up that people won't know already (except the Samarium thing), and it's not really very challenging provided you have a big calculator. Maybe it's even more of a maths problem than a maths puzzle - see this meta post. – Rand al'Thor Apr 9 '15 at 8:33

This isn't so much a puzzle as it is a list of instructions to get a secret number, but I'll humour you.

1. Start with the number of U.S. ounces in a U.S. gallon.

There are 8 ounces in a cup, 2 cups in a pint, 2 pints in a quart, and 4 quarts in a gallon, for a total of 8 × 2 × 2 × 4 = 128 ounces in a gallon.

1. Subtract the atomic number for Samarium.

Samarium has an atomic number of 62, so our result is 128 - 62 - 66.

1. Add the amount of days in February on a leap year.

February has 29 days in a leap year, so 66 + 29 = 95.

1. Multiply this by 6 factorial.

6 factorial is 720, so 95 × 720 is 68400.

1. Divide this by pi rounded to the nearest whole.

Pi rounded to the nearest whole is 3, so 68400 ÷ 3 = 22800.

1. Divide this by xx+x if x=4

44 + 4 = 48, and 22800 divided by 48 is 475.

1. Add xxxxxx if x=y and y = 2z and z=3

If z = 3, then y = 6 and x = 6, so we add 666666 to get 667141.

1. Multiply the amount of prime numbers under 20

There are eight prime numbers under 20 (2, 3, 5, 7, 11, 13, 17, 19), so we multiply by 8 to get 5337128.

20 factorial is 2432902008176640000 (Wolfram Alpha), so 5337128 plus that is 2432902008181977128.

1. Divide this by 1001110001000000000 in the base 10 system (It's in binary there)

1001110001000000000 in base 2 is 320000 in base 10, so our result is 7602818775568.678525.