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Question 1 of 6
hard
The ratio of boys to girls is 3:5. If there are 24 boys, how many students total?
Explanation: 3 parts=24, 1 part=8, total parts=8, 8×8=64
Question 2 of 6
hard
Two numbers are in ratio 4:7. Their sum is 55. Find the larger number.
Explanation: Total parts=11, 1 part=5, larger=7×5=35
Question 3 of 6
hard
A recipe needs flour:sugar in ratio 5:2. If using 250g flour, how much sugar?
Explanation: 5 parts=250, 1 part=50, sugar=2×50=100g
Question 4 of 6
hard
Find x: (x+3):7 = 4:2
Explanation: (x+3)/7=4/2=2, x+3=14, x=11
Question 5 of 6
hard
In a bag, red:blue:green marbles = 3:4:5. If there are 60 marbles total, how many red?
Explanation: Total parts=12, 1 part=5, red=3×5=15
Question 6 of 6
hard
A map scale is 2 cm : 5 km. Two cities are 8 cm apart on map. Actual distance?
Explanation: 2cm→5km, 1cm→2.5km, 8×2.5=20km
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