Mathematics Grade 7 15 min

Repeating patterns

Repeating patterns

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1

Introduction & Learning Objectives

Learning Objectives Identify the core unit of a given repeating pattern. Describe repeating patterns using words and simple mathematical rules. Predict the next several terms in a repeating pattern. Determine the element at a specific position (e.g., the 50th term) in a repeating pattern using division and remainders. Create their own repeating patterns based on given criteria. Connect repeating patterns to real-world phenomena and problems. Have you ever noticed how some things in life seem to happen over and over again in the same order? 🔄 From the days of the week to the notes in a song, patterns are everywhere! In this lesson, we'll dive into the fascinating world of repeating patterns. You'll learn how to spot them, describe them, and even predict what comes...
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Key Concepts & Vocabulary

TermDefinitionExample Repeating PatternA sequence of elements (numbers, shapes, colors, sounds) where a specific group of elements occurs continuously in the same order.Red, Blue, Green, Red, Blue, Green, ... Core Unit (or Repeat Unit)The smallest group of elements that repeats itself to form the entire pattern.In 'Red, Blue, Green, Red, Blue, Green, ...', the core unit is 'Red, Blue, Green'. TermAn individual element or item within a sequence or pattern. Each element has a specific position.In 'A, B, C, A, B, C, ...', 'A' is the 1st term, 'B' is the 2nd term, 'C' is the 3rd term. PositionThe numerical location of a term within a pattern, usually starting from 1 for the first term.In 'circle, square, triangle, circle, square...
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Core Formulas

Identifying the Core Unit Length To find the length of the core unit, observe the sequence until the elements begin to repeat exactly from the start of the pattern. Count the number of elements in this first complete cycle. This rule helps you determine how many unique elements make up one full repetition of the pattern. For example, in A, B, C, A, B, C, the core unit is A, B, C, and its length is 3. Finding the Term at a Specific Position Let $N$ be the desired position of the term, and $L$ be the length of the core unit. 1. Calculate $N \div L$. 2. If the remainder is $0$, the term is the *last* element of the core unit. 3. If the remainder is $R$ (where $R \neq 0$), the term is the element at the $R$-th position within the core unit. This rule uses division and remainders...

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Sample Practice Questions

Easy
Consider the pattern: â–², â–¼, â—„, â–º, â–², â–¼, â—„, â–º, ... What is the core unit of this pattern?
A.â–², â–¼, â—„, â–º
B.â–², â–¼
C.â–², â–¼, â—„
D.â–², â–¼, â—„, â–º, â–²
Easy
What is the length of the core unit in the pattern: 5, 1, 5, 8, 5, 1, 5, 8, ...?
A.2
B.3
C.4
D.5
Easy
The pattern for a string of lights is Red, Green, Blue, Red, Green, Blue, ... What is the next color in the sequence?
A.Green
B.Red
C.Blue
D.Yellow

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