Online Test — Ratio, Proportion and Percentages
10 Questions • 15 min • Chapter MCQ
15:00
Question 1 of 10
Simplify the ratio \(16 : 24\)
2:3
3:4
4:6
8:12
Explanation: GCF=8; 16÷8=2, 24÷8=3 → 2:3
Question 2 of 10
Find the equivalent ratio of 3:7
6:14
6:21
9:14
9:28
Explanation: Multiply by 2: 3×2=6, 7×2=14
Question 3 of 10
If \(5 : 8 = x : 24\), find \(x\).
12
15
18
20
Explanation: 5/8 = x/24 → x = (5×24)/8 = 15
Question 4 of 10
10 pens cost ₹150. Find cost of 7 pens.
₹95
₹100
₹105
₹110
Explanation: 1 pen=₹15; 7 pens=₹105
Question 5 of 10
Check if 4, 6, 8, 12 are in proportion.
Yes
No
Cannot say
Sometimes
Explanation: 4×12=48, 6×8=48 → equal ✓
Question 6 of 10
A map scale is \(1:25,000\). What does 4 cm represent?
1 km
2 km
3 km
4 km
Explanation: 4×25000=100000 cm=1 km
Question 7 of 10
The ratio of boys to girls in a class is 3:5. If there are 24 boys, how many girls?
30
35
40
45
Explanation: 3 parts=24 → 1 part=8; 5 parts=40 girls
Question 8 of 10
If \(x:y = 3:4\) and \(y:z = 6:7\), find \(x:z\).
9:14
9:28
7:18
3:7
Explanation: x/y=3/4, y/z=6/7 → x/z = (3/4)×(6/7)=18/28=9/14 → 9:14
Question 9 of 10
In a scale drawing, 1 cm represents 5 m. What drawing length represents 35 m?
5 cm
6 cm
7 cm
8 cm
Explanation: 35 ÷ 5 = 7 cm
Question 10 of 10
Two numbers are in ratio 4:7. Their sum is 55. Find the smaller number.
15
20
25
30
Explanation: 4x+7x=11x=55 → x=5; smaller=4×5=20