Wendel, Elvi, Fiva and Dashel

Behind the curtain they ran the act one last time, the way they'd rehearsed it — four routines braided into a single show, each of them carrying one.

Wendel went first, because Wendel loved a date. "Somebody shouts a birthday, and I tell them the day of the week," he said. "I don't memorize a calendar. I anchor the year's doomsday, then I just step — by sevens — until I land on the date. Weekdays go around and around by sevens, so I never fall off." He'd worn a groove in that idea; it felt like walking a path he knew in the dark.

Elvi's routine was the ×11 flash. "Give me any two-digit number and I times it by eleven before you finish asking. Twenty-three?" She mimed prying the 2 and the 3 apart. "I open a gap between the digits, add them — five — and drop it in the middle. Two, five, three. Two-fifty-three." She grinned. "It's not fast fingers. It's that eleven copies a number into itself, shifted, so the middle is just the sum of the neighbors."

Fiva squared numbers that ended in five. "Thirty-five times thirty-five? I round the 3 up to its friendly partner — three times four is twelve — and every one of these ends in twenty-five. Twelve twenty-five. Always. Because a number ending in five is sitting exactly between two easy neighbors, and the pair of them do the heavy lifting."

Dashel went last, and Dashel raced the calculator. "Add me two big numbers. I answer from the big end first, out loud, so the answer's already mostly true before the machine has carried a single digit."

The curtain went up.

For one held breath, the light was blinding and the room was a wall of faces, and every one of them felt the freeze coming — the blank, white what-was-my-first-line dread.

Then Wendel heard someone call out a date, the way people always did, and his feet found the path. Anchor the doomsday. Step by sevens. He landed on the weekday and said it before he'd decided to, and the room gasped, and the freeze melted into something warm and loud.

After that they were just doing the thing they knew. Elvi caught a number out of the air and split it open. Fiva took a five and folded it into its friendly pair. The methods held them up like a floor they'd built themselves and then forgotten was under their feet.

Near the end, a small voice from the front row — a kid, gripping the edge of their seat — said, "But what if you get one wrong?"

The crew glanced at each other. It was the question under all the nerves.

Dashel crouched at the stage edge. "Here's the secret," he said, not performing now, just talking. "None of us is guessing out here. Wendel isn't hoping the weekday is right — the sevens make it right. Elvi isn't lucky — eleven always copies the number that way. Fiva's fives always land on twenty-five. I'm not fast, I just start where the answer is biggest." He tapped the stage. "The tricks work by themselves. We just have to trust the method enough to say it out loud."

The kid thought about that. "So the nervous part isn't about being right."

"The nervous part is just the lights," Fiva said gently. "The right part was decided back when we learned why each one works."