Carr laugh crazily as the 7 continued to tickle her. She laughed until her eyes began to water, but her arms weren't long enough to be able to wipe away the tears. She looked down and something caught her eye. There was a burn mark in the back of the 7. That must have been where the sizzling sound had come from. The burn was shaped like... like numbers, she realized. '2+5' had been burned into the 7. she read out loud. Looking ahead of her and trying to wriggle from the relentless tickling, Carr spotted the equation '2+5' written backwards on the wall where the seven had crashed into it earlier. The beginnings of a thought sprung up in her mind.

"Eight minus one!" she shouted out loud.

The 7 released her immediately and made a high-pitched squeaking noise like a mouse being stepped on. Carr fell back onto her rear end and quickly spouted, "21 divided by three. Ten minus three. Six plus one."

The 7 continued to squeal while backing away from Carr, giving the girl time to retrieve her wand. "Seven times one," she called. She began to smell something similar to burning paper and, the next second, the 7 had burst into flames. It made one more mad lunge for Carr, but she sidestepped it easily and said, "Fifty-six divided by eight."

The flames blazed, causing the he 7 to fall forward and crumple into a pile of ashes. At the same time, the walls opened up to reveal the exits again and Carr continued on through the maze, feeling far more confident than she had when she'd started.