Five number games of brain training. difficulty that go up every day. It is brain warm up for work or study every day. About games: ■Worm Calc Trying to establish the formula. — Computing, Reaction ■Mini Sudoku Fill 1 to 4 once in that each column, each row, and each of the four 2×2 subgrids. — Reasoning, Concentration ■Find formula Choose a correct formula from answers. — Memory, Computing ■Match Match Turning the card and complete all of the pairs. — Memory, Reasoning ■Find differ Find ou