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Matrix Coding - Beginner Level: grid coding BEGINNER

Ready to master matrix coding? This concept mastery features 20 beginner-level challenges. Worksheet 2 of 30 sharpens your grid coding skills. Master grid coding, row-column decoding, position coding through guided practice. Perfect for entry-level test preparation.

📝 Worksheet 2 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner level

What you'll learn in this worksheet:
Your progress through Matrix Coding
Worksheet 2 of 30 (6% complete)

Question 1

Using this 5×5 cipher matrix: ★ ♠ ♣ ♥ ♦ ♣ ♥ ♦ ★ ♠ ♦ ★ ♠ ♣ ♥ ♠ ♣ ♥ ♦ ★ ♥ ♦ ★ ♠ ♣ Letters A-T map to cells in row-major order (A→★, B→♠, C→♣, D→♥, E→♦, etc.) What is the encoded form of 'PUZZLE'?
Encoding 'PUZZLE': P→♠ L→★ E→♦ = ♠★♦
decoding, cipher, puzzle

Question 2

In matrix: 1 4 7 2 5 8 3 6 9 Which column has the minimum sum?
Column sums: Col1=6, Col2=15, Col3=24. Minimum is Column 1 with sum 6
operations, analysis, comparison

Question 3

Original matrix: 2 4 6 8 10 12 14 16 18 After rotated-270 transformation, the matrix becomes:
Applying rotated-270 transformation yields:
6 12 18
4 10 16
2 8 14
transformation, geometry, rotation

Question 4

In the 4×4 matrix: A B C D E F G H I J K L M N O P If we follow the anti-diagonal path (Start at (1,4) and move diagonally down-left), what word do we get?
Following the anti-diagonal path: (1,4)=D (2,3)=G (3,2)=J (4,1)=M → DGJM
path, navigation, reading

Question 5

If A=0001, B=0010, C=0011, D=0100, E=0101, F=0110, G=0111, H=1000, I=1001, J=1010, K=1011, L=1100 (binary sequence 1-12), then 'HEAD' in binary?
Binary coding: H=1000 + E=0101 + A=0001 + D=0100 = 1000010100010100
binary, advanced, encoding

Question 6

In a 5×5 matrix: Row1: A B C D E Row2: F G H I J Row3: K L M N O Row4: P Q R S T Row5: U V W X Y 'SOFT' is coded as (row,col) combination. What is the code?
Matrix positions: S=(4,4) O=(3,5) F=(2,1) T=(4,5) → Combined code: 44352145
matrix, position, coding

Question 7

In pattern matrix: * @ # $ @ # $ * # $ * @ $ * @ # Code 'BADC' using A=col1, B=col2, C=col3, D=col4, row advances sequentially (row0, row1, row2, row3, then repeats)?
Coding process: B→@ A→@ D→@ C→@ = @@@@
pattern, symbols, coding

Question 8

In a 6×6 matrix (row0-5, col0-5) containing letters A-Z and digits 0-9 in row-major order, encode 'PUZZLE' by giving row and column numbers concatenated.
Position mapping: P→(2,3) U→(3,2) Z→(4,1) Z→(4,1) L→(1,5) E→(0,4) → 233241411504
cipher, position, encoding

Question 9

Find the missing element (?) in this matrix pattern: A B C B C D C D ? What should replace the '?'?
Pattern: each cell is the next letter in alphabet from left/top

Step 1: Observe the pattern in first row: A → B → C (increment by 1)
Step 2: Second row: B → C → D (also increment by 1)
Step 3: Third row follows same pattern: C → D → ?
Step 4: Therefore, ? should be E (D + 1)
Pattern: Each row and column increases alphabetically by 1 position

Answer: E
pattern, completion, reasoning

Question 10

Original matrix: 2 4 6 8 10 12 14 16 18 After column-reversed transformation, the matrix becomes:
Applying column-reversed transformation yields:
14 16 18
8 10 12
2 4 6
transformation, geometry, rotation

Question 11

In matrix: 1 4 7 2 5 8 3 6 9 Which row has the maximum sum?
Row sums: Row1=12, Row2=15, Row3=18. Maximum is Row 3 with sum 18
operations, analysis, comparison

Question 12

Using this 5×5 cipher matrix: ★ ♠ ♣ ♥ ♦ ♣ ♥ ♦ ★ ♠ ♦ ★ ♠ ♣ ♥ ♠ ♣ ♥ ♦ ★ ♥ ♦ ★ ♠ ♣ Letters A-T map to cells in row-major order (A→★, B→♠, C→♣, D→♥, E→♦, etc.) What is the encoded form of 'SECRET'?
Encoding 'SECRET': S→♦ E→♦ C→♣ R→♥ E→♦ T→★ = ♦♦♣♥♦★
decoding, cipher, puzzle

Question 13

In a 5×5 matrix: Row1: A B C D E Row2: F G H I J Row3: K L M N O Row4: P Q R S T Row5: U V W X Y 'BRAIN' is coded as (row,col) combination. What is the code?
Matrix positions: B=(1,2) R=(4,3) A=(1,1) I=(2,4) N=(3,4) → Combined code: 1243112434
matrix, position, coding

Question 14

Using this 5×5 cipher matrix: ★ ♠ ♣ ♥ ♦ ♣ ♥ ♦ ★ ♠ ♦ ★ ♠ ♣ ♥ ♠ ♣ ♥ ♦ ★ ♥ ♦ ★ ♠ ♣ Letters A-T map to cells in row-major order (A→★, B→♠, C→♣, D→♥, E→♦, etc.) What is the encoded form of 'PUZZLE'?
Encoding 'PUZZLE': P→♠ L→★ E→♦ = ♠★♦
decoding, cipher, puzzle

Question 15

In pattern matrix: * @ # $ @ # $ * # $ * @ $ * @ # Code 'BADC' using A=col1, B=col2, C=col3, D=col4, row advances sequentially (row0, row1, row2, row3, then repeats)?
Coding process: B→@ A→@ D→@ C→@ = @@@@
pattern, symbols, coding

Question 16

In the 4×4 matrix: A B C D E F G H I J K L M N O P If we follow the first column path (Start at (1,1) and move down), what word do we get?
Following the first column path: (1,1)=A (2,1)=E (3,1)=I (4,1)=M → AEIM
path, navigation, reading

Question 17

Matrix A: 7 2 2 7 1 5 9 4 1 Matrix B: 2 7 4 8 6 8 4 6 6 What is the result of matrix addition (element-wise)?
Performing element-wise addition:
Row1: 7+2=9 + 2+7=9 + 2+4=6
Row2: 7+8=15 + 1+6=7 + 5+8=13
Row3: 9+4=13 + 4+6=10 + 1+6=7
arithmetic, operations, calculation

Question 18

In pattern matrix: * @ # $ @ # $ * # $ * @ $ * @ # Code 'DCBA' using A=col1, B=col2, C=col3, D=col4, row advances sequentially (row0, row1, row2, row3, then repeats)?
Coding process: D→$ C→$ B→$ A→$ = $$$$
pattern, symbols, coding

Question 19

If A=0001, B=0010, C=0011, D=0100, E=0101, F=0110, G=0111, H=1000, I=1001, J=1010, K=1011, L=1100 (binary sequence 1-12), then 'BAD' in binary?
Binary coding: B=0010 + A=0001 + D=0100 = 001000010100
binary, advanced, encoding

Question 20

In the 4×4 matrix: A B C D E F G H I J K L M N O P If we follow the last column path (Start at (1,4) and move down), what word do we get?
Following the last column path: (1,4)=D (2,4)=H (3,4)=L (4,4)=P → DHLP
path, navigation, reading
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