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Turn your number system notes into flashcards with AI

Upload a PDF, slides, typed notes or a photo of a textbook page. Get flashcards for base conversions, place value and two's complement, then review them on a spaced schedule.

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Drop files here or browsePDF, DOCX, PPTX, text or photos of your notes · several files with Plus

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Why number system practice needs repetition

Binary, octal, decimal and hexadecimal look simple until an exam asks you to convert 0x3F to base 10 under time pressure, which is why number system flashcards work so well for this topic. Repeated recall of place values, powers of the base and common conversions builds the speed that worked problems demand.

Convert between binary, octal, hexadecimal and decimal with flashcards that show the steps.
Drill powers of 2 and place values until you can recall them without counting.
Review two's complement and signed integer cards alongside the base conversions they depend on.
Export to Anki, PDF, DOCX or CSV on the Plus plan when you want to study elsewhere.

Example number system flashcards

What is the base of the binary number system?Base 2, using only the digits 0 and 1, because each place value is a power of 2.

How do you convert decimal 10 to binary?1010, since 8 + 2 = 10 and the bits for 8 and 2 are set.

What hexadecimal digit represents decimal 11?B, because hex digits A through F stand for 10 through 15.

What is the base of the octal number system?Base 8, using the digits 0 through 7, with each octal digit mapping to exactly three bits.

Why is two's complement used for negative integers in binary?It lets addition and subtraction use the same circuitry for signed and unsigned values, since negation is inverting the bits and adding 1.

Generate the full set

Built from your material

Flashcards come from the pages you upload, so the terms match your course rather than a generic list.

Spaced repetition

Cards you miss come back sooner, and the ones you know fade into longer intervals.

Photos work too

Snap a page of worked examples and text recognition reads it, so handwritten or printed notes can become cards.

How it works

Add your notes

Upload a PDF, DOCX, PPTX, plain text or an image of your number system material.

Review the cards

Check the generated flashcards and edit any conversion that does not match your class notes.

Study on a schedule

Work through the deck in the browser, and let spaced repetition choose what to review next.

If you are looking for a printable set somebody else made, you can skip that search. Upload the worksheet or chapter you are actually studying and generate a custom deck that follows your instructor's examples and notation.

Spaced repetition matters most for the conversions you keep getting wrong. Keep sessions short, study the cards you miss more often, and check your answers against the worked steps in your notes.

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Frequently asked questions

How many number system flashcards should I study per session?

Short sessions of 15 to 25 cards work well for most students, especially when you focus on conversions you have missed. Spaced repetition will bring the difficult cards back more often.

What order should I learn binary, octal and hex in?

Start with binary, because octal and hex are shorthand for grouping binary digits. Then practice converting each base to decimal and back until the place values feel automatic.

Can I export my number system flashcards to Anki?

Yes, but exports to Anki, PDF, DOCX and CSV are part of the Plus plan. The free plan lets you study in the browser with 3 generations per month.

Do I need a credit card to try DeckOwl?

No. You can start without a credit card, and students get 40% off with a school email.

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Keep exploring the topic

Review the main ideas visually or practice recalling them.