Ratio And Proportion Test

Result

Ratio And Proportion Test - 1

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Question 1
1 / -0

If four numbers a, b, c and d are in proportion, then the numbers a and d are known as

A
extremes

B
means

C
proportionals

D
adjacents

Solution

If 4 numbers are in proportion, it means a : b : : c : d.
Here, b and c are means.
a and d are extremes.
Question 2
1 / -0

If 84 is divided into two parts in the ratio of 4 : 3, then what will be the difference between the two numbers?

A
6

B
8

C
10

D
12

Solution

Let numbers be 4x and 3x.

4x + 3x = 84
7x = 84
x = 12

First number = 4 x 12 = 48

Second number = 3 x 12 = 36

Difference = 48 - 36 = 12
Question 3
1 / -0

If a : b = b : c, then which of the following equations is true?

A
b² = ac

B
c² = ab

C
a² = bc

D
None of them

Solution

Whenever a : b = b : c, we have:

(Middle number)²= First number x Last number

b² = ac