Proportion and Ratio Problems flashcards
22 practice cards drawn from the Proportion and Ratio Problems lessons. Tap a card to turn it over. Every answer is checked against the lesson it came from.
Read the Proportion and Ratio Problems lessons in full →
If 2 cost 6, what do 6 cost?
18
from “Direct Proportion”
If 5 cost 25, what do 10 cost?
50
from “Direct Proportion”
4 workers take 3 days. How long do 3 workers take?
4
from “Inverse Proportion”
3 workers take 12 days. How long do 6 workers take?
6
from “Inverse Proportion”
y = kx, and y = 18 when x = 6. What is k?
3
from “The Constant of Proportionality”
y = 3x. What is y when x = 6?
18
from “The Constant of Proportionality”
2 cost 12. What do 7 cost?
42
from “Proportion by Unit Value”
2 cost 8. What do 5 cost?
20
from “Proportion by Unit Value”
Written with the first share at 4 parts, what does 2 : 1 become?
4 : 2
from “Rewriting a Ratio to Match a Share”
Written with the first share at 4 parts, what does 2 : 3 become?
4 : 6
from “Rewriting a Ratio to Match a Share”
6 : 3, and the first share is 24. What is the second share?
12
from “Ratios with a Constant Part”
8 : 5, and the first share is 16. What is the second share?
10
from “Ratios with a Constant Part”
3 : 5 becomes 4 : 4 with nothing added. How many parts in total?
8
from “Ratios with a Constant Total”
1 : 4 becomes 2 : 3 with nothing added. How many parts in total?
5
from “Ratios with a Constant Total”
5 and 8 each grow by 2. What is the gap now?
3
from “Ratios with a Constant Difference”
4 and 6 each grow by 1. What is the gap now?
2
from “Ratios with a Constant Difference”
Before 2 : 5, after 3 : 5, and the second quantity is unchanged. How many parts did the first gain?
1
from “Before-and-After Ratio Problems”
Before 1 : 3, after 3 : 3, and the second quantity is unchanged. How many parts did the first gain?
2
from “Before-and-After Ratio Problems”
1 cm stands for 20 km. How far is 5 cm?
100
from “Map Scales”
1 cm stands for 5 km. How far is 9 cm?
45
from “Map Scales”
Every side of a 2 by 3 rectangle is multiplied by 2. The area grows how many times?
4
from “Scaling Area”
Every side of a 2 by 3 rectangle is multiplied by 3. The area grows how many times?
9
from “Scaling Area”