Samacheer Kalvi Class 5 Maths Solutions Term 1 Chapter 6 Information Processing Exercise 6.1

A. Fill In The Boxes

 

Question 1. Fill in the missing numbers to complete the sequence in the grid.

Answer: The grid should be filled with numbers from 1 to 9 in order. This forms a complete 3x3 number square.In simple words: Just complete the grid by writing the numbers from 1 to 9 in the right places.

🎯 Exam Tip: When filling number sequences, always check if the numbers are ordered horizontally, vertically, or both. For a simple grid, assume a natural reading order.

 

Question 2. Fill in the missing numbers in the grid using only 1, 2, and 3, ensuring each number appears once in each row and column.

Answer: The grid is completed by placing numbers 1, 2, and 3 such that no number repeats in any row or column. This is like a mini-Sudoku.In simple words: Put 1, 2, or 3 in each empty box. Make sure no number is repeated in any row or column.

🎯 Exam Tip: For puzzles like this, start with rows or columns that have only one empty box. This makes it easier to find the missing number.

 

Question 3. Fill in the missing numbers in the grid using only 1, 2, and 3, ensuring each number appears once in each row and column.

Answer: The completed grid ensures that numbers 1, 2, and 3 appear exactly once in each row and column. This makes sure all the numbers are balanced across the grid.In simple words: Fill in the boxes with 1, 2, or 3. No number should be repeated in the same row or column.

🎯 Exam Tip: Look for the number that can only go in one specific empty spot. This often helps solve the puzzle faster.

 

Question 4. Fill in the missing numbers in the grid using only 1, 2, and 3, ensuring each number appears once in each row and column.

Answer: The grid is filled with numbers 1, 2, and 3, making sure each number is used only once in every row and every column. This completes the logic puzzle.In simple words: Use 1, 2, or 3 to fill each empty box. Each row and column must have each number only once.

🎯 Exam Tip: Double-check all rows and columns after filling to ensure no numbers are repeated, which is a common mistake.

 

B. Solve 3 x 3 Magic Square Using The Numbers From 1 To 9, So That The Sum Is 15 Both Horizontally And Vertically.

Question. Construct a 3x3 magic square using numbers 1 to 9, where the sum of each row, column, and main diagonal is 15.

Answer: A magic square is a grid where every row, column, and main diagonal adds up to the same total, which is 15 in this case. The numbers 1 through 9 are used exactly once.In simple words: Fill the boxes with numbers from 1 to 9. Each line (side to side, up and down, and corner to corner) must add up to 15.

🎯 Exam Tip: The number 5 is always in the center of a 3x3 magic square using numbers 1-9. This is a good starting point for solving.

 

C. Complete The Following 4 × 4 Sudoku By Using The Numbers 1, 2, 3, 4

 

Question 1. Complete the 4x4 Sudoku grid using numbers 1, 2, 3, 4.

Answer: The 4x4 Sudoku grid is completed by placing numbers 1, 2, 3, and 4 such that each number appears exactly once in each row, column, and 2x2 sub-grid. This requires careful logical deduction.In simple words: Fill the Sudoku puzzle with 1, 2, 3, and 4. Each row, each column, and each small 2x2 square must have all four numbers without repeating.

🎯 Exam Tip: Always look for cells where only one number can fit based on existing numbers in its row, column, and 2x2 box. These are the easiest to fill first.

 

Question 2. Complete the 4x4 Sudoku grid using numbers 1, 2, 3, 4.

Answer: The Sudoku puzzle is completed by ensuring each row, column, and 2x2 sub-grid contains the numbers 1, 2, 3, and 4 exactly once. This type of puzzle builds critical thinking skills.In simple words: Fill the puzzle with numbers 1, 2, 3, and 4. Make sure no number repeats in any row, column, or small 2x2 box.

🎯 Exam Tip: When a number can only go in one specific cell within a 2x2 block, that is a strong hint to fill that cell first.

 

Question 3. Complete the 4x4 Sudoku grid using numbers 1, 2, 3, 4.

Answer: The completed 4x4 Sudoku grid shows numbers 1, 2, 3, and 4 placed so that each number appears once in every row, every column, and every 2x2 sub-grid. This is a standard Sudoku solving technique.In simple words: Fill the Sudoku puzzle using numbers 1, 2, 3, and 4. Each row, column, and small 2x2 square must contain each number only once.

🎯 Exam Tip: If a number is missing from a 2x2 box, check its row and column to see if it's already there, which will narrow down its possible placement in the box.

 

Question. d. Can you spot the duplicate?
DEF, EFD, FDE, EFD, FED, DFE, EDF
Answer: The duplicate item in the list is 'EFD'. It appears more than once. Recognizing patterns helps in finding these duplicates quickly.In simple words: The word 'EFD' is written twice in the list.

🎯 Exam Tip: When asked to find duplicates in a list, carefully read each item and cross-check it with all other items to ensure accuracy.

 

Question. e. Can you find the mistake? Explain
ABC, ACB, BCA, BAA, CAB, CBA
Answer: The mistake is in the item 'BAA'. All other items in the list (ABC, ACB, BCA, CAB, CBA) use three different letters. 'BAA' uses the letter 'A' twice, which breaks the pattern.In simple words: The mistake is 'BAA' because it has two 'A' letters, but all the other words use three different letters.

🎯 Exam Tip: When looking for a mistake in a pattern, first identify the rule or structure that most items follow, then find the one that breaks that rule.