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Number-Letter Codes - Advanced Level: sum codes ADVANCED

Quick competitive exam prep session: 20 advanced-level number-letter codes questions. Worksheet 27 of 30 - Focus: sum codes. Practice numeric equivalents, alphabet numbering, code conversion with instant feedback. Great for advanced students needing complex scenarios and multi-step problems practice.

📝 Worksheet 27 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Advanced level

What you'll learn in this worksheet:
Your progress through Number-Letter Codes
Worksheet 27 of 30 (90% complete)

Question 1

If A=1, B=1, C=2, D=3, E=5, F=8... (Fibonacci sequence), what is 'DOG' coded as?
Fibonacci coding: D=3, O=610, G=13 → concatenated = 361013
fibonacci, sequence, advanced

Question 2

If a word's code is the sum of its letter positions (A=1,B=2...), what is 'LION's code?
Sum calculation: L=12 + I=9 + O=15 + N=14 = 50
sum, arithmetic

Question 3

If letters are coded as (position mod 10), 'PYTHON' becomes?
Modular coding: P=16%10=6, Y=25%10=5, T=20%10=0, H=8%10=8, O=15%10=5, N=14%10=4 → concatenated = 650854
modular, advanced

Question 4

For 'PQR', odd positions (1st,3rd,5th...) are coded as their position numbers, even positions are shifted by 1 letter forward. What is the code?
Odd/Even coding: Pos1:P→16, Pos2:Q→Q, Pos3:R→18 → 16Q18
position, pattern, mixed

Question 5

If A=26, B=25, C=24... Z=1 (reverse order), then 'CAB' is coded as?
Reverse coding: C=24 + A=26 + B=25 → concatenated = 242625
reverse, sequence

Question 6

If each letter is coded as the square of its position (A=1→1, B=2→4, C=3→9...), what is 'BED' coded as?
Square coding: B=2²=4, E=5²=25, D=4²=16 → concatenated = 42516
square, exponential, advanced

Question 7

If A=26, B=25, C=24... Z=1 (reverse order), then 'COW' is coded as?
Reverse coding: C=24 + O=12 + W=4 → concatenated = 24124
reverse, sequence

Question 8

If each letter is coded as the square of its position (A=1→1, B=2→4, C=3→9...), what is 'BED' coded as?
Square coding: B=2²=4, E=5²=25, D=4²=16 → concatenated = 42516
square, exponential, advanced

Question 9

If A=2, B=3, C=5, D=7, E=11... (prime numbers in order), what is 'FISH' coded as?
Prime coding: F→13, I→23, S→67, H→19 → concatenated = 13236719
prime, numbers, advanced

Question 10

If A=1, B=1, C=2, D=3, E=5, F=8... (Fibonacci sequence), what is 'BED' coded as?
Fibonacci coding: B=1, E=5, D=3 → concatenated = 153
fibonacci, sequence, advanced

Question 11

If a word's code is the product of its letter positions, what is 'FISH's code?
Product calculation: F=6 × I=9 × S=19 × H=8 = 8208
product, arithmetic

Question 12

If A=26, B=25, C=24... Z=1 (reverse order), then 'BED' is coded as?
Reverse coding: B=25 + E=22 + D=23 → concatenated = 252223
reverse, sequence

Question 13

For 'DEF', odd positions (1st,3rd,5th...) are coded as their position numbers, even positions are shifted by 1 letter forward. What is the code?
Odd/Even coding: Pos1:D→4, Pos2:E→E, Pos3:F→6 → 4E6
position, pattern, mixed

Question 14

If A=26, B=25, C=24... Z=1 (reverse order), then 'BOX' is coded as?
Reverse coding: B=25 + O=12 + X=3 → concatenated = 25123
reverse, sequence

Question 15

If each letter is coded as the sum of digits of its position (A=1→1, B=2→2, ..., J=10→1+0=1...), what is 'BED' coded as?
Digit sum coding: B=2→digit_sum=2, E=5→digit_sum=5, D=4→digit_sum=4 → concatenated = 254
digits, sum, pattern

Question 16

If A=26, B=25, C=24... Z=1 (reverse order), then 'PIG' is coded as?
Reverse coding: P=11 + I=18 + G=20 → concatenated = 111820
reverse, sequence

Question 17

If each letter is coded as the sum of digits of its position (A=1→1, B=2→2, ..., J=10→1+0=1...), what is 'ACE' coded as?
Digit sum coding: A=1→digit_sum=1, C=3→digit_sum=3, E=5→digit_sum=5 → concatenated = 135
digits, sum, pattern

Question 18

If letters are coded as (position mod 8), 'ALPHABET' becomes?
Modular coding: A=1%8=1, L=12%8=4, P=16%8=0, H=8%8=0, A=1%8=1, B=2%8=2, E=5%8=5, T=20%8=4 → concatenated = 14001254
modular, advanced

Question 19

If A=1, B=1, C=2, D=3, E=5, F=8... (Fibonacci sequence), what is 'FISH' coded as?
Fibonacci coding: F=8, I=34, S=4181, H=21 → concatenated = 834418121
fibonacci, sequence, advanced

Question 20

If each letter is shifted forward by 4 positions (A→E), what is 'DOG' coded as?
Shift coding: D→H(+4), O→S(+4), G→K(+4) → HSK
shift, caesar, cipher
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