SGD 19.90

Each student has one colour of 20 rings. First student shakes the 3 dice together, if they are 2, 2, 1 the student can use add, subtract, multiply and divide to calculate. For example if the student calculates 2 + 2 + 1 = 5, then he can put his yellow ring on the game board column on number 5. Then the next student shakes the dice and calculate. The student who finishes all his rings onto the game board is the winner.