What does one semicircle, two parallelograms, three triangles and a rectangle add up to?

Before you dress up and go trick-or-treating, try a problem-solving challenge full of cool Halloween costumes!

This easy Sudoku puzzle features the lowercase letters a, b, c, and d! Solve the puzzle by writing each letter only once in each row, column, and block.

Solve the mystery of who's who in this puzzle full of spooky, cute, and creative Halloween costumes! 

Use your logic skills to out what each kid at the costume contest dressed up as!