To provide a game apparatus which can increase the interest of a user in a game and can maintain the continuity of a game play, and a game controlling method.

Symbols for mathematical operations of the arithmetic operations, parentheses and an equal sign are exhibited in squares of a symbols for mathematical operations panel 250 of a display screen 240 of the game apparatus and single-digit numerals 0-9 are exhibited to be repeatable in squares of a numerals panel 260. The user moves a cursor on the symbols for mathematical operations panel 250 and the numerals panel 260, selects one of the numerals form the numerals panel 260 to input the same in a computing formula panel 270, and selects one of the symbols for mathematical operations from the symbols for mathematical operations panel 250 to input the same in the computing formula panel 270. The computing formula comprised of the numeral and the symbol for mathematical operations selected by the user is displayed on the computing formula panel 270. When the numeral is input in the computing formula panel 270, the cursor is automatically moved in the symbols for mathematical operations panel 250 and when the symbol for mathematical operations is input in the computing formula panel 270, the cursor is moved in the numerals panel 260.