7 is the actual answer but did you know the tecnical answer is 13 when you add 1 when you subtract and when you add it is 42.
30
13%% of 339 = 0.0013*339 = 0.4407 To subtract 13 %% from 339 = 339 - 0.4407 = 338.5593
-55
42
-42
7 is the actual answer but did you know the tecnical answer is 13 when you add 1 when you subtract and when you add it is 42.
48.
7 times 6 is 42. If you subtract two, you get 42-2= 40.
30
32
-13 is the number must you subtract from -13 to get a difference of 0
The only common factor of 13 and 42 is 1, since 13 is prime and 42 is not a multiple of 13.
I assume you mean "divisibility rule". Separate the last three digits, and subtract it from the remaining digits. For example: 45003: separate 45 and 003, and subtract 45 - 3 = 42. Since 42 is a multiple of 7, the original number is a multiple of seven. Note that this rule works for 7, 11, and 13. The reason it works is related to the fact that 1001 = 7 x 11 x 13.
Oh, dude, it's like basic math, right? So, if you're trying to figure out what plus 13 equals 42, you just subtract 13 from 42 and you get... wait for it... 29! Boom, math wizard over here!
13%% of 339 = 0.0013*339 = 0.4407 To subtract 13 %% from 339 = 339 - 0.4407 = 338.5593
-55