Year 7 - HF3: 1 - Binary and Decimal

What is the name of the Base 2 number system (uses only 2 numbers)?

• Binary

• Decimal

• Hex

What is the name of the Base 10 number system (uses only 10 numbers)?

• Binary

• Decimal

• Hex

How do we write 10 in binary (8 bit binary)?

• 0000 1010
• 0000 0101
• 0000 0010
• 0000 10

How do we write 99 in binary (8 bit binary)?

• 0110 0011
• 0000 0099
• 0110 0010
• 1100 0011

What is the denary value for the binary number 0000 1101

• 12
• 13
• 14
• 15

What is the decimal value for the binary number 1010 1111?

• 174

• 175

• 176

• 177

What is the next number in the sequence 128,64,32,16...

• 15
• 8
• 10
• 4

Why do we use binary?

• computer circuits use 0s and 1s to represent OFF and ON
• because that is the computer's language

What is the maximum decimal number I can use with 8 bit binary (1111 1111)?

• 254

• 255

• 256

• 257

The missing binary heading is what?
128,  64, ___ , 16, 8, 4, 2, 1

• 32
• 30
• 60
• 20