What's in a Name Chapter Notes | Mathematics Olympiad Class 4 PDF Download

Introduction

Imagine you have a big jar of candies. You want to know how many candies are in there, right? Counting helps you find out exactly how many candies you have. It's like a superpower that helps you figure out the number of things you have or see.

Let's Understand with Story

Once upon a time, in a lovely garden, there were two best friends named Disha and Hardik. They loved spending time together exploring the wonders of nature. One sunny day, as they were strolling in the garden, they came across a fascinating sight—a long trail of tiny ants marching in a line.

• Disha's curiosity sparked, and she exclaimed, "Look, Hardik! The ants are going somewhere in such an organized way. I wonder how many of them are there!"
• Hardik, being the quick thinker that he was, replied, "Let's find out! But counting so many ants would be quite tricky."
• Disha and Hardik put their heads together to come up with a smart plan. 
• Hardik suggested, "Why don't we draw a line on the sand for every ant that passes by? Then we can count the lines to know how many ants there are!"
• Excited by the idea, they fetched a stick and started marking lines on the sand as the ants passed by them. They were careful not to miss any ant, making sure each one was represented by a line.

Lines made on Sand

• After a while, they stopped and counted the lines. "There are 24 lines!" exclaimed Disha, amazed by their discovery.
• Hardik smiled and said, "That means there are 24 ants in this trail."
• Disha was excited at how counting the lines helped them figure out the number of ants without having to count each one individually.
  

 She realized that counting was not just a fun activity but also a useful skill that could help them solve many puzzles and mysteries.

Counting is important for many reasons:

• Knowing Amounts: Counting helps you know how many things you have or how many things you need. For example, if you want to share your candies with friends, you need to count them to make sure everyone gets a fair share.
• Doing Math: When you learn math, counting is where it all starts. Addition, subtraction, multiplication, and division are all based on counting. It's like the building blocks of math.
• Solving Problems: Counting helps you solve puzzles and problems. For instance, if you see a group of birds and want to know how many there are, you can count them to find out.
• Understanding the World: Counting helps you understand big things and small things. For example, you can count how many days are in a week or how many legs a spider has.
• Making Plans: When you count, you can make plans. For instance, if you know you have five days until your friend's birthday, you can plan what to do each day to get ready for the celebration.

So, counting isn't just about numbers. It's a way to explore, learn, and understand the world around you!

Counting Number of Alphabets

Counting the number of alphabets in a name is like counting anything else. Let's take an example name, "Samantha."

• Write the Name: First, write down the name you want to count the alphabets for. In our case, it's "Samantha."
• One by One: Start with the first letter, "S." That's one alphabet.
  
• Continue: Move to the next letter, "a." That's two alphabets.
• Keep Going: Count each letter in the name until you reach the last one. In "Samantha," there are eight letters, so you keep counting until you reach the letter "a" again.
• Final Count: After counting each letter, you'll find that "Samantha" has eight alphabets.

So, the key is to go through each letter in the name one by one and count them. It's just like counting candies in a jar, but instead, you're counting the letters in a name!

Learn by Practicing - 1

Once upon a time, in a happy family, there were two sisters named Richa and Ayushi. They loved playing together and having fun, but one day, they had a small fight.

• Richa said, "My name is bigger than yours, Ayushi!"
• Ayushi replied, "No way! My name is bigger!"
  
• Their brother Rahul heard them arguing and came to help. He said, "Hey, don't worry! We can figure out who has a bigger name easily."
  
• He then suggested, "Let's count the letters in your names. The more letters you have, the bigger your name is!"
• Richa and Ayushi thought it was a great idea. They sat down with Rahul and counted the letters in their names.
• Richa counted, "R-I-C-H-A. That's five letters."
  
• Ayushi counted, "A-Y-U-S-H-I. That's six letters."
  
• Rahul smiled and said, "Ayushi, your name has more letters, so it's bigger!"

Richa and Ayushi were surprised but happy to know how to count the number of letters in their names. They hugged each other, patched up their little fight, and learned that counting letters can solve many things.

So, counting isn't just about numbers. It's a way to explore, learn, and solve problems, just like Richa and Ayushi did!

Counting Alphabets in Number Names

Counting the number of letters in the names of numbers is a fun way to learn about both counting and numbers themselves. Here's how you can do it:

• Write Down the Number: Start by writing down the number whose name you want to count the letters for. For example, let's take the number "seven."
• Spell Out the Number: Write the number in words. "Seven" is spelled as S-E-V-E-N.
• Count the Letters: Count each letter in the word. "Seven" has five letters: S-E-V-E-N.
  
• Repeat for Other Numbers: You can repeat this process for other numbers as well. For instance, "three" has five letters (T-H-R-E-E), "eleven" has six letters (E-L-E-V-E-N), and "twenty" has six letters (T-W-E-N-T-Y)

Number Names

Number names refer to the words we use to represent numerical quantities. For example, instead of saying "1," we say "one." These number names are used to express numbers in spoken and written language, especially when we are dealing with quantities or counting objects. Here are the number names for the first few natural numbers:

Number names are present for every number to help us express numerical quantities in spoken and written language, making it easier to understand and communicate numerical information.

Learn by Practicing - 2

Once upon a time in the colourful land of Numerica, there were three best friends: Number Eighty-Nine, Number Ninety, and Number Ninety-One. They were curious about which one of them had the biggest name, so they decided to find out together.

• The friends gathered around a magical counting tree, where each leaf had a letter written on it. "Let's count the letters in our names to see who has the biggest name!" exclaimed Number Eighty-Nine, who was always full of energy.
• Number Ninety nodded eagerly. "Yes, let's do that! I want to know if my name is the longest."
• Number Ninety-One, the thoughtful one, suggested, "We should take turns counting each other's letters to make sure we don't miss any."
• Excited to begin, they started with Number Eighty-Nine's name. Each friend took turns plucking leaves from the tree and counting the letters in "Eighty-Nine." They counted carefully and found that it had ten letters.
  
• Next was Number Ninety's turn. They spelt out "Ninety" and counted the letters together. It turned out to have six letters.
  
• Finally, they moved on to Number Ninety-One's name. "Ninety-One," they spelled, and counted the letters diligently. To their surprise, it had nine letters.
  
• After counting all the letters, they realized that Number Eighty-Nine had the biggest name with ten letters.
• "I guess I have the biggest name!" exclaimed Number Eighty-Nine happily.
• "But we all have unique and wonderful names," said Number Ninety with a smile.
• "And now we know how to count the letters in our names," added Number Ninety-One.

The friends celebrated their newfound knowledge and friendship, knowing that each of their names was special in its own way.

Just like this, we can count the letters in all the numbers' names and other words as well. Keep practicing, and you'll become a pro at counting letters in no time!