Introduction
Number Pyramids are a core part of Intelligence Tests. They consist of numbers arranged in a triangular format where each position has a specific spatial relationship with others. The goal is to identify patterns and find missing links.
Explanation Step by Step
To solve pyramid problems, observe the visual shape formed by the given numbers. If the first set of numbers forms a 'V' shape on the left, the second set will likely form a similar 'V' shape on the right side of the pyramid.
Number Pyramid Diagram: This structure helps in identifying mirror images and spatial patterns between numerical sequences.
Sub-topics
Pyramids - Use of Numbers
This sub-topic focuses on mapping coordinates. Each number is treated as a point in space. Most questions rely on the symmetry of the pyramid structure.
Examples
Example 1
Tricks and Shortcuts
Always look for the central axis. If the movement is clockwise on the left, it will often be counter-clockwise on the right.
Common Mistakes
Students often skip a row while counting or fail to maintain the same distance between numbers in the pattern.
Practice Questions
Easy Questions
- In the given pyramid, which number is to the immediate right of 8?
- If 2-4 is linked to 3-6, what is linked to 4-7?
- Identify the numbers forming the third row of the pyramid.
Medium Questions
- If 7-8-9 forms a horizontal line, identify the corresponding line on the right.
- Find the missing pattern: 4-2-1 : 6-3-1 :: 7-4-2 : ?
- Calculate the difference between the largest number in row 4 and row 2.
Hard Questions
- Analyze the geometric pattern 11-7-8-12 and find its symmetrical equivalent.
- Determine the pattern if the pyramid is inverted mentally.
- What would be the 21st number in the pyramid if the rows continue?
Revision Summary
Focus on the spatial arrangement and symmetry. Practice identifying shapes like triangles and lines within the pyramid structure.
25,32,12,37 : 33,26,31,37 :: 38,18,29,23 : ?