If a progression goes 15 __ 21, then the missing number will dictate how the pattern increases with every number. If the missing number is 18, this means that the numbers go up in threes. The pattern would continue 24, 27, 30, 33...
Tape #15
46
there is not one
1
The logic behind this level is that the part of the figure that is missing is where the number is on the keypad, so for the first figure over the door, the upper left corner is missing, where the number 1 is on the keypad. For the second figure, the right middle is missing, which is where the 6 is, etc. Type in the pass code 1643 to open the door.
(Divide both sides by 6)x = 2.5
E.g. 6 + _ = 15. To find the answer, subtract 6 from 15 = 9. Answer: 6 + 9 = 15 This may be relevant or irrelevant to the question.
x = missing number x/10 = 15 operate on the equation, doing the same operation to both sides, to isolate x (namely, multiply both sides by 10)
17 :)
If you convert those numbers into letters, it spells "Love You".
c) 17
For about the first 15 years of space travel,almost all of the people who did it were men.