Just 123: Junior Edition — One Move
Ages 7+ (Grades 2+). The equation is false. Swap any two digits — one move — and make it true. 33 − 12 = 12 is wrong… until 12 becomes 21. Fifty false equations, each with a verified fix (and every “also works” alternate listed in the key). A gentle warm-up in seeing structure. 59 pages · PDF · print at home or solve on a tablet.
$4.99 Buy Junior — $4.99
Just 123: Senior Edition — Fill in the Blanks
Ages 10+ (Grades 5+). Each □ holds a number built from 1, 2, and 3. Fifty puzzles ramp from “2 + 1 = □” to the hard set with squares and cubes (□² − 3 = 1). Find-all puzzles tell you when there's more than one answer — can you catch every single one? Complete, machine-verified answer key in the back. 59 pages · PDF.
$6.99 Buy Senior — $6.99Get Both — $9.99 (save $1.99)
One brainy household, two levels. Junior for the young solver, Senior for the puzzle detective.
Buy the Bundle — $9.99Try before you buy. Grab six free puzzles — three from each book — with the full answer key.
Download the free sampler (PDF) →Instant download · Personal & single-classroom license · Questions: [email protected]