Miscellaneous

Stripping a unit or percentage from a number

To strip the unit, rate or percentage from a number, convert it to a number (or decimal)

$100 as number                                        | 100
40/day to decimal                                     | 40
20% as dec                                            | 0.2

Proportions / Rule of three

Known as the rule of three, these phrases help you find the number required to maintain a proportion.

6 is to 60 as 8 is to what                     | 80
5 is to 10 as what is to 80                    | 40

These phrases also work with units:

5 km is to 500m as 5 cm is to what                       | 5 mm
30 minutes is to 3 hours as what is to 60 seconds        | 10 seconds

Comparing numbers

min() and max() in Soulver

larger of 100 and 200                                | 200
greater of 100 and 200                               | 200
                                                     
smaller of 5 and 10                                  | 5
lesser of 5 and 10                                   | 5

Midpoint

half of 175                                          | 87.5 
midpoint between 150 and 300                         | 225

Random numbers

To generate a random integer in a specified range:

random number between 1 and 10                      | 7

To generate a random floating point number, use the range 0 to 1

random number between 0 and 1                      | 0.4793193723

LCM & GCD

Lowest common multiple and greatest common divisor

gcd of 20 and 30                         | 10 
lcm of 5 and 8                           | 40

Permutations & Combinations

10 permutation 3                         | 720
25 combination 3                         | 2,300

Or alternatively use a slightly clearer syntax:

3 permutations of 10                     | 720
3 combinations of 25                     | 2,300

Clamp

clamp 26 between 5 and 25                | 25
clamp 4 from 5 to 25                     | 5