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Matrix Coding - Beginner-Intermediate Level: matrix decoding BEGINNER-INTERMEDIATE

Comprehensive race against clock worksheet covering 20 beginner-intermediate-level matrix coding problems. Worksheet 8 of 30 emphasizes matrix decoding. Master matrix patterns, grid coding, row-column decoding through detailed explanations. Difficulty: building on fundamentals with moderate challenges. Tailored for developing preparation.

📝 Worksheet 8 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner-intermediate level

What you'll learn in this worksheet:
Your progress through Matrix Coding
Worksheet 8 of 30 (26% complete)

Question 1

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 'LOGIC' is coded as (row,col) combination. What is the code?
Matrix positions: L=(3,2) O=(3,5) G=(2,2) I=(2,4) C=(1,3) → Combined code: 3235222413
matrix, position, coding

Question 2

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 3

In matrix: 1 2 3 4 5 6 7 8 9 What is the sum of anti-diagonal?
The sum of anti-diagonal: 3 + 5 + 7 = 15
numbers, matrix, arithmetic

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 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

Question 5

Original matrix: 1 2 3 4 5 6 7 8 9 After rotated-90 transformation, the matrix becomes:
Applying rotated-90 transformation yields:
7 4 1
8 5 2
9 6 3
transformation, geometry, rotation

Question 6

In matrix: 1 2 3 4 5 6 7 8 9 What is the sum of anti-diagonal?
The sum of anti-diagonal: 3 + 5 + 7 = 15
numbers, matrix, arithmetic

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

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 'CAB' in binary?
Binary coding: C=0011 + A=0001 + B=0010 = 001100010010
binary, advanced, encoding

Question 9

Matrix A: 8 9 7 2 6 7 8 2 7 Matrix B: 6 3 2 6 6 8 9 9 5 What is the result of matrix addition (element-wise)?
Performing element-wise addition:
Row1: 8+6=14 + 9+3=12 + 7+2=9
Row2: 2+6=8 + 6+6=12 + 7+8=15
Row3: 8+9=17 + 2+9=11 + 7+5=12
arithmetic, operations, calculation

Question 10

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 top row path (Start at (1,1) and move right), what word do we get?
Following the top row path: (1,1)=A (1,2)=B (1,3)=C (1,4)=D → ABCD
path, navigation, reading

Question 11

If letters are at coordinates A(1,1), B(1,2), C(1,3), D(1,4), E(2,1), F(2,2), G(2,3), H(2,4), I(3,1), J(3,2), K(3,3), L(3,4), M(4,1), N(4,2), O(4,3), P(4,4), then 'DATA' coordinates are?
Coordinate mapping: D(1, 4) A(1, 1) A(1, 1)
coordinates, position, mapping

Question 12

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

Question 13

In a 6×6 matrix (row0-5, col0-5) containing letters A-Z and digits 0-9 in row-major order, encode 'ENCODE' by giving row and column numbers concatenated.
Position mapping: E→(0,4) N→(2,1) C→(0,2) O→(2,2) D→(0,3) E→(0,4) → 042102220304
cipher, position, encoding

Question 14

If letters are at coordinates A(1,1), B(1,2), C(1,3), D(1,4), E(2,1), F(2,2), G(2,3), H(2,4), I(3,1), J(3,2), K(3,3), L(3,4), M(4,1), N(4,2), O(4,3), P(4,4), then 'CODE' coordinates are?
Coordinate mapping: C(1, 3) O(4, 3) D(1, 4) E(2, 1)
coordinates, position, mapping

Question 15

Find the missing element (?) in this matrix pattern: ★ ♠ ♣ ♠ ♣ ♥ ♣ ♥ ? What should replace the '?'?
Pattern: cyclic pattern of symbols

Step 1: Identify symbol order: ★ → ♠ → ♣ → ♥ → ♦ (cyclic)
Step 2: First row: ★, ♠, ♣ (positions 1,2,3)
Step 3: Second row: ♠, ♣, ♥ (positions 2,3,4)
Step 4: Third row: ♣, ♥, ? (positions 3,4,5)
Step 5: Position 5 in cycle is ♦
Pattern: Each row shifts one position forward in the symbol cycle

Answer: ♦
pattern, completion, reasoning

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 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

Question 17

In a 6×6 matrix (row0-5, col0-5) containing letters A-Z and digits 0-9 in row-major order, encode 'SECRET' by giving row and column numbers concatenated.
Position mapping: S→(3,0) E→(0,4) C→(0,2) R→(2,5) E→(0,4) T→(3,1) → 300402250431
cipher, position, encoding

Question 18

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 'HARD' is coded as (row,col) combination. What is the code?
Matrix positions: H=(2,3) A=(1,1) R=(4,3) D=(1,4) → Combined code: 23114314
matrix, position, coding

Question 19

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 20

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 'LEAD' in binary?
Binary coding: L=1100 + E=0101 + A=0001 + D=0100 = 1100010100010100
binary, advanced, encoding
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