Samacheer Kalvi Class 4 Maths Solutions Term 2 Chapter 3 Patterns InText Questions

Try These (Text Book Page No. 20)

To frame magic squares by using.

 

Question 1. Multiples of nine.
Answer:

The sum of each row, column, and diagonal in this magic square is 135.
In simple words: This table is a magic square because when you add the numbers in any row, any column, or from corner to corner (diagonally), the total sum is always the same number, which is 135. All the numbers in the square are multiples of nine.

🎯 Exam Tip: To verify a magic square, always check the sum of all rows, columns, and both main diagonals to ensure they are identical.

 

Question 2. Multiples of hundred
Answer:

The sum of each row, column, and diagonal in this magic square is 1500.
In simple words: This is another magic square where all the numbers are multiples of one hundred. If you add up any row, any column, or any diagonal, the total sum is always 1500. This makes it a magic square.

🎯 Exam Tip: When creating magic squares, start by picking a central number or by arranging numbers in a pattern to make sums equal across all directions.

 

Activity (Text Book Page No. 21)

 

Question. Write all the alphabets and then draw a symmetrical lines for each letters.
Answer: The alphabets are: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z. Many of these letters have symmetrical lines. For example, 'A' has a vertical line of symmetry down the middle, and 'B' has a horizontal line of symmetry. Some letters like 'S' have rotational symmetry, while others like 'J' have no lines of symmetry.
In simple words: First, list all the letters from A to Z. Then, for each letter, draw lines that show where you could fold the letter in half and both sides would match perfectly. Some letters have one line, some have two, and some have none.

🎯 Exam Tip: Remember that a line of symmetry divides a shape into two identical mirror images. Practice identifying different types of symmetry for various letters and shapes.