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Number-Letter Codes - Intermediate-Advanced Level: numeric equivalents INTERMEDIATE-ADVANCED

This fundamentals focus worksheet contains 20 intermediate-advanced-level number-letter codes problems. Worksheet 21 of 30 focuses on numeric equivalents. Practice alphabet numbering, code conversion, dual coding with our step-by-step solutions. Difficulty: advanced concepts with increasing complexity. Recommended for advanced developing learners.

📝 Worksheet 21 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Intermediate-advanced level

What you'll learn in this worksheet:
Your progress through Number-Letter Codes
Worksheet 21 of 30 (70% complete)

Question 1

If each letter is shifted forward by 2 positions (A→C), what is 'BOOK' coded as?
Shift coding: B→D(+2), O→Q(+2), O→Q(+2), K→M(+2) → DQQM
shift, caesar, cipher

Question 2

If each letter is coded as its ASCII value (A=65, B=66...), what is 'ANT' coded as?
ASCII coding: A=65, N=78, T=84 → concatenated = 657884
ascii, computer

Question 3

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 4

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

Question 5

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 6

If a word's code is the sum of its letter positions (A=1,B=2...), what is 'BEAR's code?
Sum calculation: B=2 + E=5 + A=1 + R=18 = 26
sum, arithmetic

Question 7

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 8

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 9

If a word's code is the product of its letter positions, what is 'ACE's code?
Product calculation: A=1 × C=3 × E=5 = 15
product, arithmetic

Question 10

If A=1, B=2, C=3... Z=26, then 'WOLF' is coded as?
Letter to number: W=23 + O=15 + L=12 + F=6 → concatenated = 2315126
basic, sequence

Question 11

If A=1, B=2, C=3... Z=26, then 'FISH' is coded as?
Letter to number: F=6 + I=9 + S=19 + H=8 → concatenated = 69198
basic, sequence

Question 12

For 'FISH', odd positions use reverse coding, even positions use shift coding. What is the result?
Alternating coding: F→21(rev), I→K(+2), S→8(rev), H→J(+2) → 21K8J
alternating, mixed, advanced

Question 13

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 14

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 15

If a word's code is the sum of its letter positions (A=1,B=2...), what is 'EAGLE's code?
Sum calculation: E=5 + A=1 + G=7 + L=12 + E=5 = 30
sum, arithmetic

Question 16

If a word's code is the product of its letter positions, what is 'BEAR's code?
Product calculation: B=2 × E=5 × A=1 × R=18 = 180
product, arithmetic

Question 17

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 18

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 19

For 'JKL', 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:J→10, Pos2:K→K, Pos3:L→12 → 10K12
position, pattern, mixed

Question 20

If each letter is shifted forward by 4 positions (A→E), what is 'PEN' coded as?
Shift coding: P→T(+4), E→I(+4), N→R(+4) → TIR
shift, caesar, cipher
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