Last updated on Oct 23, 2026

Binary Addition (OCR GCSE Computer Science): Quizzes

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Binary Addition

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What is the result of $0 + 0$ in binary addition?

$0$

What is the result of $0 + 1$ in binary addition?

$1$

What is the result of $1 + 1$ in binary addition?

$10$

What is the result of $1 + 1 + 1$ in binary addition (with a carry)?

$11$

Where should you start when adding two binary numbers?

Rightmost column

What is $010001 + 100001$ in binary?

$1100010$

What is the binary number $010001$ in denary?

$17$

What is the binary number $100001$ in denary?

$33$

What is the largest binary number that can be represented with 8 bits?

$11111111$

What is $11111111$ (in binary) in denary?

$255$

What is an overflow error in binary addition?

When result is too large for bits

What happens to the leftmost $1$ when adding $1$ to $11111111$ in an 8-bit system?

It is lost

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