1) Find the numbers for A, B, C, and D in the following sudoku. a) A=5, B=5, C=2, D=1 b) A=2, B=5, C=2, D=1 c) A=3, B=5, C=1, D=1 2) How many three –digits numbers can be formed with the digits 3, 5, 6, 9 if repetition are allowed? a) 64 b) 16 c) 23 3) Look at the following picture and find the total number of routes from A to C. a) 6 b) 12 c) 5 4) Which one has a reflectional symmetry? a) b) c) 5) Which shape has more than one line of symmetry? a) b) c)

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