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Number-Letter Codes - Advanced Level: code conversion ADVANCED

Exam-focused holistic practice ★ worksheet: 20 advanced-level number-letter codes questions. Worksheet 23 of 30 targets code conversion. Build proficiency in letter-number mapping, positional codes, ASCII patterns with detailed solutions. Ideal for advanced competitive exam preparation.

📝 Worksheet 23 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Advanced level

What you'll learn in this worksheet:
Your progress through Number-Letter Codes
Worksheet 23 of 30 (76% complete)

Question 1

If A=1, B=1, C=2, D=3, E=5, F=8... (Fibonacci sequence), what is 'BIRD' coded as?
Fibonacci coding: B=1, I=34, R=2584, D=3 → concatenated = 13425843
fibonacci, sequence, advanced

Question 2

If A=1, B=2, C=3... Z=26, then 'EAGLE' is coded as?
Letter to number: E=5 + A=1 + G=7 + L=12 + E=5 → concatenated = 517125
basic, sequence

Question 3

For 'MNO', 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:M→13, Pos2:N→N, Pos3:O→15 → 13N15
position, pattern, mixed

Question 4

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 5

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 6

If vowels (A,E,I,O,U) are coded as 'V' and consonants as 'C', what is the code for 'DOG'?
Vowel/Consonant coding: D→C, O→V, G→C → CVC
vowel, consonant, pattern

Question 7

If A=2, B=3, C=5, D=7, E=11... (prime numbers in order), what is 'ABC' coded as?
Prime coding: A→2, B→3, C→5 → concatenated = 235
prime, numbers, advanced

Question 8

For 'XYZ', find the differences between consecutive letter positions (A=1,B=2...). Format as comma-separated values.
Positions: [24, 25, 26] → Differences: [1, 1]
difference, sequence, pattern

Question 9

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 'FISH' coded as?
Digit sum coding: F=6→digit_sum=6, I=9→digit_sum=9, S=19→digit_sum=10, H=8→digit_sum=8 → concatenated = 69108
digits, sum, pattern

Question 10

If each letter is coded as its ASCII value (A=65, B=66...), what is 'BAG' coded as?
ASCII coding: B=66, A=65, G=71 → concatenated = 666571
ascii, computer

Question 11

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 'FISH' coded as?
Digit sum coding: F=6→digit_sum=6, I=9→digit_sum=9, S=19→digit_sum=10, H=8→digit_sum=8 → concatenated = 69108
digits, sum, pattern

Question 12

If letters are coded as (position mod 7), 'NUMBER' becomes?
Modular coding: N=14%7=0, U=21%7=0, M=13%7=6, B=2%7=2, E=5%7=5, R=18%7=4 → concatenated = 006254
modular, advanced

Question 13

If A=1, B=2, C=3... Z=26, then 'BED' is coded as?
Letter to number: B=2 + E=5 + D=4 → concatenated = 254
basic, sequence

Question 14

If each letter is coded as its ASCII value (A=65, B=66...), what is 'CAR' coded as?
ASCII coding: C=67, A=65, R=82 → concatenated = 676582
ascii, computer

Question 15

If A=26, B=25, C=24... Z=1 (reverse order), then 'ACE' is coded as?
Reverse coding: A=26 + C=24 + E=22 → concatenated = 262422
reverse, sequence

Question 16

If a word's code is the product of its letter positions, what is 'BED's code?
Product calculation: B=2 × E=5 × D=4 = 40
product, arithmetic

Question 17

If A=2, B=3, C=5, D=7, E=11... (prime numbers in order), what is 'BED' coded as?
Prime coding: B→3, E→11, D→7 → concatenated = 3117
prime, numbers, advanced

Question 18

If each letter is coded as the square of its position (A=1→1, B=2→4, C=3→9...), what is 'EGG' coded as?
Square coding: E=5²=25, G=7²=49, G=7²=49 → concatenated = 254949
square, exponential, advanced

Question 19

If letters are coded as 5-bit binary (A=1=00001, B=2=00010...), 'ABC' is coded as?
Binary coding: A=1=00001, B=2=00010, C=3=00011 → concatenated = 000010001000011
binary, advanced

Question 20

If vowels (A,E,I,O,U) are coded as 'V' and consonants as 'C', what is the code for 'CAT'?
Vowel/Consonant coding: C→C, A→V, T→C → CVC
vowel, consonant, pattern
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