Binary Number Conversion Techniques

This video tutorial by Craig explains how computers store numbers using binary and how to convert between denary and 8-bit binary. It covers two methods: the divide-by-two method, which involves dividing a number by two and noting remainders, and the binary number line method, which uses a number line to determine binary values. The tutorial also demonstrates converting binary back to denary and emphasizes the importance of using a number line to avoid mistakes. The video is aimed at helping students understand binary conversion, especially for exams.

What are the two methods mentioned for converting denary numbers to binary?

• Multiply-by-two and binary number line

• Subtract-by-two and binary number line

• Divide-by-two and binary number line

• Divide-by-three and binary number line

In the divide-by-two method, what do you do with the remainder?

• Add it to the next division

• Multiply it by two

• Write it in the remainder column

• Ignore it

How do you read the binary number after using the divide-by-two method?

• From right to left

• From bottom to top

• From left to right

• From top to bottom

In the binary number line method, what do you do if the number is greater than or equal to the column value?

• Skip the column

• Double the column value

• Write a zero and move to the next column

• Write a one and reduce the number by the column value

What is the binary representation of the number 89 using the binary number line method?

• 0-1-0-1-1-0-0-1

• 1-1-0-1-0-0-1

• 0-1-1-0-0-1-1-0

• 1-0-1-1-0-0-1

When converting from binary to denary, what should you do with the columns that have a one?

• Add their values

• Multiply their values

• Subtract their values

• Ignore them

What is the denary equivalent of the binary number 0-1-1-0-0-1-1-0?

• 96

• 100

• 102

• 104

Why is it important to show your working in an exam when converting denary to binary?

• To use more paper

• To confuse the examiner

• To ensure you don't make a mistake

• To make the exam longer

What should you do if an exam asks for an 8-bit binary number but you have fewer bits?

• Add leading zeros

• Add trailing zeros

• Leave it as it is

• Add ones instead of zeros

At what level of education are you expected to convert only 8-bit binary numbers?

• Postgraduate

• A-Level

• Undergraduate

• GCSE