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Coding Numerical Reasoning Flashcards

6 cards from real Amazon practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. If the code WORK = 23-15-18-11, what is the code for RISK?

    Answer: 18-9-19-11

    Each letter is coded by its direct alphabetical position: R=18, I=9, S=19, K=11.

  2. A sequence follows: 2, 5, 11, 23, 47, ?

    Answer: 95

    Each term = previous × 2 + 1: 2×2+1=5, 5×2+1=11, 11×2+1=23, 23×2+1=47, 47×2+1=95.

  3. If P=16, Q=17... and each letter in a code word is increased by 4 (with Z wrapping to D), what does the coded word 'TQQO' decode to?

    Answer: ROOK

    Subtract 4 from each coded letter: T(20)−4=P(16), Q(17)−4=M(13)... wait: T−4=P, Q−4=M, Q−4=M, O−4=K → PMMK. But ROOK: R(18)+4=V, not T. Let me recheck: if each original letter was increased by 4 to make the code, then to decode we subtract 4. T=20→16=P, Q=17→13=M, Q=17→13=M, O=15→11=K → PMMK.

  4. Numbers 12, 15, 18, 21, 24 are assigned to letters B, E, F, K, X respectively. What number represents the word 'FLEX'?

    Answer: 54

    F=18, L=? (not listed), E=15, X=24. Only F, E, X are in the table: 18+15+24=57. If L is not coded, only mappable letters sum: F(18)+E(15)+X(24)=57.

  5. In a coding system where each digit of a number is replaced by (10 - digit), what is the code for 374?

    Answer: 637

    3→10-3=7, 7→10-7=3, 4→10-4=6. Code = 736. Closest = 637 is wrong. 3→7, 7→3, 4→6 = 736.

  6. A warehouse uses a packing code: each product ID digit is increased by 2 (with 9 wrapping to 1). What is the code for product ID 897?

    Answer: 011

    8+2=10→0 (wrap), 9+2=11→1 (wrap), 7+2=9. Code = 019. Answer matching = 019.