Four controls, four puzzles. The engine only powers up if all four answers are correct at the same time.
On the star that blazes at the centre of the system, a kilogram would weigh several times its Earth weight — keep only the whole number part. Multiply that number by the total number of formats the document workshop accepts.
The field that guides the particles bears the name of a Serbian physicist. Reverse every letter of his name to get the key.
The coldest vacuum there is is measured in degrees. Take its value without the sign, convert it to binary.
Between the first man's leap into space and the mining of the very first block of a bank-free currency, count the days separating these two feats. Divide by a thousand, round to the nearest integer.