ReasoningAbility.com

Number-Letter Codes - Beginner-Intermediate Level: reverse mapping BEGINNER-INTERMEDIATE

This deep dive ★ worksheet contains 20 beginner-intermediate-level number-letter codes problems. Worksheet 11 of 30 focuses on reverse mapping. Practice ASCII patterns, letter value codes, numeric equivalents with our step-by-step solutions. Difficulty: building on fundamentals with moderate challenges. Recommended for developing learners.

📝 Worksheet 11 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner-intermediate level

What you'll learn in this worksheet:
Your progress through Number-Letter Codes
Worksheet 11 of 30 (36% complete)

Question 1

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 2

If each letter is shifted forward by 2 positions (A→C), what is 'BUS' coded as?
Shift coding: B→D(+2), U→W(+2), S→U(+2) → DWU
shift, caesar, cipher

Question 3

If letters are coded as 5-bit binary (A=1=00001, B=2=00010...), 'DOG' is coded as?
Binary coding: D=4=00100, O=15=01111, G=7=00111 → concatenated = 001000111100111
binary, advanced

Question 4

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 5

If each letter is shifted forward by 3 positions (A→D), what is 'CAR' coded as?
Shift coding: C→F(+3), A→D(+3), R→U(+3) → FDU
shift, caesar, cipher

Question 6

If A=1, B=1, C=2, D=3, E=5, F=8... (Fibonacci sequence), what is 'CAT' coded as?
Fibonacci coding: C=2, A=1, T=6765 → concatenated = 216765
fibonacci, sequence, advanced

Question 7

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 8

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 9

If letters are coded as (position mod 8), 'LETTER' becomes?
Modular coding: L=12%8=4, E=5%8=5, T=20%8=4, T=20%8=4, E=5%8=5, R=18%8=2 → concatenated = 454452
modular, advanced

Question 10

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 11

If each letter is shifted forward by 4 positions (A→E), what is 'CAT' coded as?
Shift coding: C→G(+4), A→E(+4), T→X(+4) → GEX
shift, caesar, cipher

Question 12

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

Question 13

If each letter is shifted forward by 3 positions (A→D), what is 'CAT' coded as?
Shift coding: C→F(+3), A→D(+3), T→W(+3) → FDW
shift, caesar, cipher

Question 14

If each letter is coded as the square of its position (A=1→1, B=2→4, C=3→9...), what is 'CAT' coded as?
Square coding: C=3²=9, A=1²=1, T=20²=400 → concatenated = 91400
square, exponential, advanced

Question 15

If A=26, B=25, C=24... Z=1 (reverse order), then 'BAD' is coded as?
Reverse coding: B=25 + A=26 + D=23 → concatenated = 252623
reverse, sequence

Question 16

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 17

If each letter is shifted forward by 4 positions (A→E), what is 'CAT' coded as?
Shift coding: C→G(+4), A→E(+4), T→X(+4) → GEX
shift, caesar, cipher

Question 18

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 19

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 20

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
Previous Worksheet Next Worksheet