Binary Numbers - Count the Dots Quiz

Multiple Choice Questions

1. What two symbols does a computer use to store information?
A) 1 and 2
B) A and B
C) 0 and 1
D) Yes and No

2. In the Count the Dots activity, what do the cards have on one side?
A) Numbers
B) Dots
C) Letters
D) Colors

3. When a card is turned face down (hidden), what number represents it?
A) 1
B) 2
C) 0
D) 10

4. Looking at the cards in order, what do you notice about the number of dots on each card compared to the card on its right?
A) It has half as many dots
B) It has the same number of dots
C) It has twice as many dots
D) It has three more dots

5. If the cards go 16, 8, 4, 2, 1, what would the next card have if you continued the pattern to the left?
A) 20
B) 24
C) 30
D) 32

6. What is the biggest number you can make using the five binary cards (16, 8, 4, 2, 1)?
A) 16
B) 25
C) 31
D) 32

7. What is a single 0 or 1 called in the binary system?
A) A byte
B) A bit
C) A dot
D) A card

8. A group of eight bits is called a:
A) Bit
B) Byte
C) Code
D) Card

Short Answer Questions

9. Using the cards (16, 8, 4, 2, 1), which cards would you flip face-up to make the number 6?

10. What binary number (using 0s and 1s) would show the cards 8, 4, 2, and 1 all face up?

11. Explain in your own words why the number 21 can be made using the 16, 4, and 1 cards.

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Answer Key

1. C) 0 and 1
2. B) Dots
3. C) 0
4. A) It has half as many dots
5. D) 32
6. C) 31
7. B) A bit
8. B) Byte
9. The 4-dot card and the 2-dot card (4 + 2 = 6)
10. 1111 (8+4+2+1 = 15)
11. Because 16 + 4 + 1 = 21 — adding up the dots on the cards that are face-up gives you the total number.