Exactly the same concept as: http://devinity.org/threads/not-a-giveaway.1510/ But now you must have at least level 50 in game and 15 posts on the forum to enter/claim le $15 prize. (To stop noobs coming and ruining it all). This will end may 1st. Spoiler: Problem 1 Simplify the boolean operation: Spoiler: Problem 2 The normal to the curve 'y = 2 - (1/x)' touches the x axis of a graph at point A. The normal to the graph at point A touches the curve at point A and point B. Find the co-ordinates of point B. Spoiler: Problem 3 Show the values for which (1 + tan x )(5 sin x − 2) = 0. Between -180 degrees and +180 degrees Spoiler: Problem 4 Compounds A, B and C are aliphatic, unbranched alkenes and are each isomers of eachother. Both A, B and C have a Mr of 70 g/mol A and B are E/Z isomers and compound H is a structural isomer of A and B Suggest the compounds A B and C. Spoiler: Problem 5 A pulley uses a steel wire of diameter 36mm and length 25m. The steel that the wire uses has a Young's modulus of 210GPa. The crane lifts a wooden mass of 2038kg. Determine the extension of the wire. Spoiler: Problem 6 Simplify Spoiler: Problem 7 Consider the following sequence. 0, 0, 1, 0, 2, 7, 2, 10, 29, 8, 38, 111, 22, 134, 413, 36, 450, 1511, 4010 Find the next number in the sequence. Hint: This uses the fibbonacci sequence and binary masks.