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Worksheetsrepresenting numbers (lesson 1 plenary)
Total questions: 22
Worksheet time: 11mins
What is the meaning of the keyword 'Binary'?
A system of numerical notation that has 2 as its base and uses only 0 and 1.
A system of numerical notation that has 10 as its base and uses digits from 0 to 9.
A programming language used for web development.
A type of computer virus.
What is the meaning of the keyword 'Bit'?
A basic unit of information in computing and digital communications, representing a binary value of 0 or 1.
A type of computer virus.
A programming language.
A hardware device used for storage.
What do we call these symbols? (a b c d e f g h i j k l m n o p q r s t u v w x y z)
letters
numbers
shapes
colors
How many of these symbols (letters) are there?
26
24
30
32
What do we call these symbols: 0 1 2 3 4 5 6 7 8 9?
digits
letters
shapes
colors
Why do we use 10 digits?
Because we have 10 fingers to count with.
Because there are 10 planets in the solar system.
Because 10 is the largest number.
Because ancient clocks had 10 hours.
What is the length of this number 314?
3 digits
2 digits
4 digits
1 digit
Can you give another example of a 3-digit number?
123
5
89
1000
How many 3-digit numbers can there possibly be?
1000
900
999
899
What do we call these symbols: 0 and 1?
binary digits.
prime numbers.
hexadecimal values.
Roman numerals.
How many binary digits are there?
2
8
10
16
What are the binary digits that digital devices use to do their 'writing'?
0 and 1
2 and 3
A and B
X and Y
Binary digits are symbols, just like letters and words.
True
False
Given the sequence 101, what is the length of this sequence?
3
1
2
4
How many 3-bit numbers can there possibly be?
8
6
4
10
Twitter (now 'X') is a ________ networking service.
social
financial
educational
medical
What was the first message posted on Twitter in 2006? Fill in the blank: just setting up my _______.
twttr
account
profile
Twitter’s coding scheme represents English characters as:
4-bit sequences
8-bit sequences
16-bit sequences
32-bit sequences
What is the maximum number of characters in a single text message?
160 (1120 ÷ 7)
256 (1792 ÷ 7)
320 (2240 ÷ 7)
140 (980 ÷ 7)
How many binary digits does it take to represent the message: See you tonight?
105 (15 characters × 7 bits each)
98 (14 characters × 7 bits each)
112 (16 characters × 7 bits each)
What is the maximum number of characters in a single text message?
160 (1120 ÷ 7)
256 (1792 ÷ 7)
320 (2240 ÷ 7)
140 (980 ÷ 7)
Which of the following are possible values in a 1-bit sequence?
A) 0
B) 1
C) 2
D) 3
