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Number-Letter Codes - Intermediate Level: alphanumeric coding INTERMEDIATE

Master number-letter codes concepts through this excellence pursuit practice set. Worksheet 16 of 30 contains 20 intermediate-level problems. Deep dive into alphanumeric coding while learning letter-number mapping, positional codes, ASCII patterns. Recommended for mid-level learners aiming for moderate complexity with mixed patterns.

📝 Worksheet 16 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Intermediate level

What you'll learn in this worksheet:
Your progress through Number-Letter Codes
Worksheet 16 of 30 (53% complete)

Question 1

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 2

If each letter is shifted forward by 1 positions (A→B), what is 'CAT' coded as?
Shift coding: C→D(+1), A→B(+1), T→U(+1) → DBU
shift, caesar, cipher

Question 3

If A=26, B=25, C=24... Z=1 (reverse order), then 'ANT' is coded as?
Reverse coding: A=26 + N=13 + T=7 → concatenated = 26137
reverse, sequence

Question 4

If each letter is shifted forward by 5 positions (A→F), what is 'BUS' coded as?
Shift coding: B→G(+5), U→Z(+5), S→X(+5) → GZX
shift, caesar, cipher

Question 5

If A=2, B=3, C=5, D=7, E=11... (prime numbers in order), what is 'BIRD' coded as?
Prime coding: B→3, I→23, R→61, D→7 → concatenated = 323617
prime, numbers, advanced

Question 6

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

Question 7

If letters are coded as (position mod 9), 'WORLD' becomes?
Modular coding: W=23%9=5, O=15%9=6, R=18%9=0, L=12%9=3, D=4%9=4 → concatenated = 56034
modular, advanced

Question 8

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 9

If a word's code is the product of its letter positions, what is 'FROG's code?
Product calculation: F=6 × R=18 × O=15 × G=7 = 11340
product, arithmetic

Question 10

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 11

If letters are coded as 5-bit binary (A=1=00001, B=2=00010...), 'CAT' is coded as?
Binary coding: C=3=00011, A=1=00001, T=20=10100 → concatenated = 000110000110100
binary, advanced

Question 12

If A=2, B=3, C=5, D=7, E=11... (prime numbers in order), what is 'BIRD' coded as?
Prime coding: B→3, I→23, R→61, D→7 → concatenated = 323617
prime, numbers, advanced

Question 13

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 14

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 15

For 'YZ', 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:Y→25, Pos2:Z→@ → 25@
position, pattern, mixed

Question 16

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 17

For 'STU', 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:S→19, Pos2:T→T, Pos3:U→21 → 19T21
position, pattern, mixed

Question 18

If a word's code is the sum of its letter positions (A=1,B=2...), what is 'CAT's code?
Sum calculation: C=3 + A=1 + T=20 = 24
sum, arithmetic

Question 19

If letters are coded as (position mod 10), 'NUMBER' becomes?
Modular coding: N=14%10=4, U=21%10=1, M=13%10=3, B=2%10=2, E=5%10=5, R=18%10=8 → concatenated = 413258
modular, advanced

Question 20

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
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