Math puzzle worksheet on powers of the imaginary unit i, where students use digits 1-9 to complete equations involving i, -1, and -i.

A worksheet titled "Powers of i" with instructions to use digits 1-9 to fill in boxes and create true statements involving powers of the imaginary unit i, with some numbers already filled in and others as blanks. Yellow number tiles (1, 2, 4, 5, 7, 8, 9) are placed beside the worksheet.