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 out different number from two group.
— Concentration, Reaction