mystery, conundrum, puzzle, enigmas, question, dilemma, quandary, paradox, mistery, brainteaser, anagram, whodunit, simultaneous equations, cryptogram, quadratic equation, problem, paradoxes, poser, imponderable, theorems, clue, hypotenuse, koan, convolutions, query, trivia, answer, unravelling, rebus, perplexities, brainteasers, euclidean geometry, crossword puzzle, nagging, boolean algebra, myth, mathematical, hieroglyph, baffles, jigsaw puzzle, hex, crossword, equations, symbologist, sleuth, cruciverbalist, pythagorean theorem, pesky, kakuro, acrostic, declarative sentence, isosceles, trilemma, theory, poincare, intrigues, icosahedron, cosines, insectlike, tarnation, quest, challenge, differential calculus, perplexes, cyclopes, ratiocination, erwin schrodinger, mathematicians, incubus, deciphering, theodicy, predicament, ambiguousness, cipher, geometer, confounding, heisenberg uncertainty principle, cui bono, simile, laius, cheops, musing, curse, jean francois champollion, unnamable, factoid, maze, boggle, infinities, conjecture, devilry, wrangle, bugaboos, flummox, abracadabra, bedeviling, isosceles triangle, subplot, woes, monologuing, pareidolia, postulate, enigma, riddles, antinomy, puzzles, antithesis, aporia, game, story, crux, conundrums, lesson, marvel, misconception, ballad, rhyming, devotional, telugu, verse, declamatory, hindi, silliest, favorite, gaelic, hymn, marathi, nonsense, nonsensical, obscene, yiddish, arabic, bawdy, enigmatic, fable

haunted, koan, screen

amaze, baffle, beat, bewilder, communicate, dumbfound, figure out, flummox, get, gravel, intercommunicate, lick, mystify, nonplus, perplex, pierce, problem, puzzle, puzzle out, screen, sieve, sift, solve, strain, stupefy, stupify, trounce, work

brain-teaser, conundrum, enigma, screen