Dr. UVC Math™ · Instant Download

The Store

Printable puzzle packs, illustrated method primers, and the full Math Puzzle Composer. Secure checkout, instant access — pay with card, Apple Pay, or Google Pay.

New here? Start free. Six puzzles — three from each Just 123 edition — with the full answer key and the method shown. Prints on plain paper, about ten minutes at the kitchen table.
Download the sampler →
Puzzle Books
Printable Puzzle Packs
Puzzle Book
Just 123 Junior — One Move
The equation is false. Swap any two digits — one move — and make it true. Fifty false equations, each with a verified fix. Ages 7+ (Grades 2+). PDF.
$4.99View →
Puzzle Book
Just 123 Senior — Fill in the Blanks & Powers
Each blank holds a number built from 1, 2, and 3 — fifty puzzles ramping from "2 + 1 = □" to the hard set with squares and cubes. Ages 10+ (Grades 5+). PDF.
$6.99View →
Bundle
Just 123 Bundle — Both Books
One brainy household, two levels. Junior for the young solver, Senior for the puzzle detective. Save $1.99.
$9.99View →
Walk Math · Book 1
Deduce Me! 25 Square-Number Riddles
25 riddles about square numbers you can solve on a walk. Five levels, answers included — and every answer comes with The Secret. Ages 8+.
$1.99View →
Digital Products
Packs, Primers & Tools
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Every method has a free interactive lesson. Play first — then take the printables home.

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