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Number-Letter Codes - Expert Level: mixed operations EXPERT

Intensive progress check 🎯 drill: 20 expert-level number-letter codes questions. Worksheet 30 of 30 hones your mixed operations abilities. Practice letter-number mapping, positional codes, ASCII patterns under timed conditions. Best for expert-level students seeking challenging problems and time-bound practice.

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

What you'll learn in this worksheet:
Your progress through Number-Letter Codes
Worksheet 30 of 30 (100% complete)

Question 1

If each letter is coded as the square of its position (A=1→1, B=2→4, C=3→9...), what is 'BAD' coded as?
Square coding: B=2²=4, A=1²=1, D=4²=16 → concatenated = 4116
square, exponential, advanced

Question 2

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 3

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 4

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 5

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 6

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 7

For 'FISH', odd positions use shift coding, even positions use position coding. What is the result?
Alternating coding: F→H(+2), I→9(pos), S→U(+2), H→8(pos) → H9U8
alternating, mixed, advanced

Question 8

If letters are coded as (position mod 9), 'LETTER' becomes?
Modular coding: L=12%9=3, E=5%9=5, T=20%9=2, T=20%9=2, E=5%9=5, R=18%9=0 → concatenated = 352250
modular, advanced

Question 9

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 10

If A=1, B=2, C=3... Z=26, then 'ACE' is coded as?
Letter to number: A=1 + C=3 + E=5 → concatenated = 135
basic, sequence

Question 11

If each letter is coded as its ASCII value (A=65, B=66...), what is 'BED' coded as?
ASCII coding: B=66, E=69, D=68 → concatenated = 666968
ascii, computer

Question 12

If each letter is coded as its ASCII value (A=65, B=66...), what is 'DOG' coded as?
ASCII coding: D=68, O=79, G=71 → concatenated = 687971
ascii, computer

Question 13

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 14

If a word's code is the product of its letter positions, what is 'DOG's code?
Product calculation: D=4 × O=15 × G=7 = 420
product, arithmetic

Question 15

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 16

For 'DOG', odd positions use reverse coding, even positions use position coding. What is the result?
Alternating coding: D→23(rev), O→15(pos), G→20(rev) → 231520
alternating, mixed, advanced

Question 17

If a word's code is the sum of its letter positions (A=1,B=2...), what is 'TIGER's code?
Sum calculation: T=20 + I=9 + G=7 + E=5 + R=18 = 59
sum, arithmetic

Question 18

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 19

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 20

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
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