CS 3: Number Systems

What are the only two numbers you can use in binary?

• 0 and 1
• 1 and 2
• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
• 1, 2, 4, 8, 16

Tags

CCSS.4.NBT.A.2

If a binary number ends with a 1, it must be...

• An odd number
• An even number
• A prime number
• The number 12

Tags

CCSS.2.OA.C.3

What is the denary number system?

• It counts the number of dens
• Our usual base 10 number system
• A special number system for computers
• Den Ary's number system

What is 0101 + 1010?
HINT:
1 + 0 = 1
0 + 1 = 1
1 + 1 = 10

• 1111
• 2020
• 146.6
• ?

A bit is 

• a numerical label assigned to each device.
• the smallest unit of data in a computer.
• a keyboarding term for typing.
• is a numeral system made up of 16 symbols.

A group of 8 bits is known as a gigabyte.

• True
• False

What is a character?

• A letter
• A number
• A symbol
• All of these

What is the ASCII code for ... A?

• 65
• 56
• 97
• 79

Your computer's code for the letter A is 01000001. Can you infer what the letter B would be?

• 10010
• 01000010
• 01010110
• 00000001

Convert 254 to binary

• 11110000
• 11111100
• 11111111
• 11111110