Start hereFive-puzzle online sampler
Five progressively harder cases: one Gentle with two-digit numbers, two Standard with three-digit numbers, then two Fiendish with four-digit numbers and one lying witness per case. Tap numbers to eliminate them, reveal sealed witness statements one at a time and enter your answer for instant feedback. Gentle and Standard use a clue budget for three-star solving; Fiendish shows all six statements so you can identify the lie.
Opens in your browser on phone, tablet or computer. Progress saves in that browser. Use Backup and Restore to keep a copy or move devices; clearing browser data removes your local progress.
Play free · email requiredPrintable PDF + interactive HTMLThe Hidden Number Files · 30 puzzles
Thirty number mysteries in two formats: an A4 printable PDF and an interactive HTML browser book, both containing the same ten Gentle, ten Standard and ten Fiendish cases. Print and solve with a pencil, or tap candidates and check answers in your browser. Gentle and Standard use a clue budget for three-star solving; each Fiendish case has one lying witness. Includes full solutions and matching edition covers.
The printable PDF has one case per page and solutions from page 33; it does not have tappable form boxes. The HTML edition checks answers automatically, tracks solved cases and stars, and saves progress in the same browser where storage is available. Use Backup and Restore to keep a copy or move devices.
Digital download — cancellation and refunds: By requesting immediate access, you agree that supply begins straight away and acknowledge that you lose your 14-day cancellation right once supply begins. Change-of-mind refunds are not available after this point. This does not affect your statutory rights if the content is faulty, misdescribed or inaccessible.
Get 30 puzzles · PDF + HTML £3.99Interactive PDF + HTML browser bookThe Hidden Number Files · 100 puzzles
Follow Zora Bell through the same 100 number mysteries in two formats: a clickable, savable PDF and an interactive HTML browser book. Both include ten story chapters and a final accusation. Later chapters introduce a lying witness; ten key cases decode the culprit’s name. Includes matching covers, elimination controls and space for working notes.
PDF: open a downloaded copy in Adobe Acrobat Reader, tap elimination boxes, type answers and notes, and use linked contents and solutions. Check answers and record stars manually; save the PDF after each session. HTML: open in a modern browser for automatic answer checking, scoring, story reveals and the final accusation. Progress and notes save in that browser where storage is available; use Backup and Restore to keep a copy or move devices. Personal use only.
Digital download — cancellation and refunds: By requesting immediate access, you agree that supply begins straight away and acknowledge that you lose your 14-day cancellation right once supply begins. Change-of-mind refunds are not available after this point. This does not affect your statutory rights if the content is faulty, misdescribed or inaccessible.
Get 100 puzzles · PDF + HTML £6.99Three HTML books + combined interactive PDFGentle · Standard · Fiendish
The complete Gentle, Standard and Fiendish collection: 300 different number mysteries supplied as three interactive HTML casebooks and one combined clickable, savable PDF. Gentle has 100 two-digit cases; Standard has 100 three-digit cases; Fiendish has 100 four-digit cases, each with exactly one lying witness. The PDF contains the same 300 cases as the three HTML books, with linked contents and solutions, tappable elimination boxes, answer fields, notes and manual score tracking.
HTML books: reveal sealed statements in Gentle and Standard, check answers automatically and track solved cases and stars. Fiendish shows all six statements so you can identify the lie. Each book saves separately in the same browser; use Backup and Restore to preserve or move progress. Combined PDF: statements are visible, and answers and scores are checked manually using linked solutions. Open in Adobe Acrobat Reader and save after each session. READ-ME-FIRST instructions are also included.
Digital download — cancellation and refunds: By requesting immediate access, you agree that supply begins straight away and acknowledge that you lose your 14-day cancellation right once supply begins. Change-of-mind refunds are not available after this point. This does not affect your statutory rights if the content is faulty, misdescribed or inaccessible.
Get the 300-puzzle collection £12.99 Choose the format that suits you: the 30-puzzle edition includes a printable PDF and an HTML browser book; the 100-puzzle edition includes interactive PDF and HTML versions; the 300-puzzle collection includes three HTML books and one combined interactive PDF. PDF and HTML versions of an edition contain the same puzzles, not extra puzzles. HTML progress stays in the same browser; use Backup and Restore before changing devices or clearing browser data. Save interactive PDFs in a compatible PDF reader after each session.
