Introduction
Correlation - Numbers is an important reasoning topic. It involves identifying mathematical relationships between numbers to find the missing value.
Explanation Step by Step
In this type of question, three numbers are given and the fourth number must be found. The relation between the first and second number is applied to the third number.
The relation may involve addition, subtraction, multiplication, division, squares, cubes, or digit-based operations. Careful observation is required.
Sometimes multiple patterns may appear correct. In such cases, checking options helps to find the correct answer.
Sub-topics
Correlation - Numbers
The main idea is to identify hidden mathematical patterns between numbers.
Examples
Example 1
Tricks and Shortcuts
Start with simple operations like addition or multiplication. Break numbers into digits if needed. Use answer options to verify the pattern.
Common Mistakes
Checking only one pattern. Ignoring digit relationships. Selecting answers without verification.
Practice Questions
Easy Questions
- 2 : 4 :: 3 : ?
- 5 : 25 :: 6 : ?
- 7 : 14 :: 8 : ?
Medium Questions
- 12 : 3 :: 20 : ?
- 9 : 81 :: 4 : ?
- 15 : 5 :: 18 : ?
Hard Questions
- 23 : 6 :: 45 : ?
- 36 : 18 :: 50 : ?
- 27 : 9 :: 81 : ?
Revision Summary
Number correlation requires understanding patterns and applying them logically. Practice improves speed and accuracy.
23² = 529