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Class IV Mathematics

Chapter 4: Tick Tick Tick

Standard NCERT & CBSE aligned study curriculum. Master concepts, track accuracy, revise weak areas, and challenge yourself with 9 customized practice modes.

Class Syllabus Selection

This topic is taught in multiple grades. Switch classes to see specific curriculum details:

Chapter Overview

Welcome to Class IV Mathematics: Tick Tick Tick. This chapter forms a core structural component of the math syllabus, designed to build analytical rigor and key formula models.

Use the detailed subtopic guide below to review standard definitions, key mathematical rules, and study guidelines.

Prerequisite Concepts

Clocks and Time

Detailed Subtopics Study Guide

Review detailed conceptual explanations, mathematical equations, and guidelines for each subtopic in this chapter:

1Analog clock minutes and hours

Concept Explanation

Reading the exact time in minutes and hours on an analog clock face, understanding the relationship between the hands.

Mathematical Representation
\text{Hour Hand position} \in [1, 12], \quad \text{Minute Hand value} = n \times 5 \text{ minutes}
Study Guideline: The hour hand moves slowly between numbers as the minute hand sweeps the circle.

2AM/PM notation

Concept Explanation

Splitting the 24-hour day into two 12-hour intervals: AM (Ante Meridiem) for morning hours and PM (Post Meridiem) for afternoon and evening hours.

Mathematical Representation
\text{Midnight to 11:59 AM} = \text{AM}; \quad \text{Noon to 11:59 PM} = \text{PM}
Study Guideline: 12:00 PM is noon, and 12:00 AM is midnight.

324-hour clock conversions

Concept Explanation

Converting standard 12-hour times with AM/PM into 24-hour military format, and vice versa.

Mathematical Representation
\text{PM time} + 12 \text{ hours} = \text{24-hour format} \quad (\text{except 12 PM})
Study Guideline: For example, 2:30 PM is 14:30. 12:15 AM is 00:15.

4Expiry dates on labels

Concept Explanation

Reading manufacturing and expiry dates on packaging labels to calculate the shelf life or verify if a product is safe to use.

Mathematical Representation
\text{Shelf Life} = \text{Expiry Date} - \text{MFG Date}
Study Guideline: Note dates written as MM/YY (e.g. 07/26 means July 2026).

5Calculating age difference

Concept Explanation

Using subtraction of years, months, and days to find the difference in age between two people or elapsed time since a birthdate.

Mathematical Representation
\text{Age} = \text{Current Year} - \text{Birth Year}
Study Guideline: If the current month is before the birth month, subtract 1 from the simple year subtraction.