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Numerator by Peter Turner

Created by: Peter Turner

Numerator is a self-working mentalism trick that can be performed in close-up, parlour, or stage settings. Spectators use their phone calculators to perform simple multiplications with random numbers, ultimately converging on a single digit that the magician reveals. The trick is adaptable for different group sizes and requires no complex math or memorization, making it accessible to performers of all skill levels. The magician writes down numbers that match the spectators' results, creating a seemingly impossible prediction.

Where to buy

Numerator from Ellusionist
EllusionistNumerator$14.99
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Key features

  • Self-working mentalism trick

  • No complex math or memorization required

  • Adaptable for different performance settings (close-up, parlour, stage)

  • Works with any phone (Android or iPhone)

  • Repeatable with no pre-show preparation

  • Can be used to 'force' or 'predict' a number

Pros

  • Affordable at $20

  • Easy to learn and perform

  • Engaging for lay audiences

  • No sleight of hand required

  • Instant tutorial available

Cons

  • Method might be obvious to magicians

  • Relies heavily on presentation and patter

Effect

Numerator is a self-working mentalism trick where spectators use their phones to perform random calculations. They multiply single-digit numbers together, then add the digits of the result until they reach a single digit. The magician correctly predicts or reveals the final number without seeing any of the calculations. The trick works with any group size, from two people to a full audience, making it adaptable for close-up or stage performances.

Full Details

Numerator is a repackaged trick from Peter Turner’s How to Read Minds 2 series. It requires no memorization, complex math, or pre-show work. The method relies on a mathematical principle that ensures all participants arrive at the same final digit, though the presentation makes it seem like the magician is reading their minds. The trick is repeatable and works on any phone (Android or iPhone).

Who Should Consider the Trick

This trick is ideal for:

  • Mentalists who want a quick, foolproof routine.
  • Magicians who prefer self-working tricks with minimal setup.
  • Performers looking for an interactive effect that engages multiple spectators.
  • Beginners, since it requires no sleight of hand or advanced techniques.

Difficulty

Numerator is extremely easy to perform. There is no sleight of hand, and the method is automatic once understood. The challenge lies in presentation—selling the effect with strong patter and confidence. As David from Magic Orthodoxy notes, "It's super easy... no math, no formula in your head."

What Magicians Say

  • Magic Orthodoxy (David) calls it "affordable at $20" and emphasizes that while magicians may recognize the method, lay audiences will be fooled with proper presentation. He warns against dismissing self-working tricks, stating, "Just because it's obvious after you learn the secret doesn't mean it's obvious."
  • Ellusionist (Peter Turner) highlights its repeatability and adaptability, calling it the "Mac Daddy of calculator-based mentalism." He demonstrates how to handle different group sizes and even includes a "wrong number" moment to enhance the illusion.

Numerator is a strong choice for performers who want a reliable, interactive mentalism effect with minimal effort. The key to success lies in presentation, making it a great tool for both beginners and experienced magicians.

What people are saying about Numerator

ellusionist says...

Anyone can do this. 100% Self-working. Repeatable. No pre-show. Works on any phone (Android or iPhone). Can be used to 'force' or 'predict' a number. Instant tutorial.

magicorthodoxy says...

Numerator is a trick that Pete does with the other four magicians that are there... they're just typing in random numbers... and he gets them all down to a single digit... self-working no math no fishing easy.

Review videos

Tutorial videos