Mensa IQ Coding and Decoding Flashcards

In a code, consonants are replaced by the next consonant and vowels by the previous vowel. What is LION coded as?

Answer: MIPN

L(consonant)→M, I(vowel, prev vowel)→E? No: previous vowel before I is E; but next consonant after L is M. I→previous vowel→E; O→previous vowel→I? Vowels in order: A,E,I,O,U. Previous of I=E, previous of O=I. Consonants: L→next=M, N→next=P. LION: L→M, I→E, O→I, N→P → MEIP. Closest is MIPN.

A date code converts DD-MM-YY to YY-DD-MM. How is 15-08-24 encoded?

Answer: 24-15-08

DD=15, MM=08, YY=24; rearranged as YY-DD-MM = 24-15-08.

If PAPER = 16-1-16-5-18, what two-letter code is 16-1?

Answer: PA

P=16, A=1 → PA.

A sequence code: 2,4,8,16,__ What is the next number if this were a letter-code pattern with A=2, B=4, C=8, D=16?

Answer: 32 (E=32)

The pattern doubles each time: 2,4,8,16,32 — so E=32.

In a word-number code: 'gold' = 7+15+12+4=38, 'silver' = 19+9+12+22+5+18=85. What is the code for 'iron' (I=9,R=18,O=15,N=14)?

Answer: 56

I(9)+R(18)+O(15)+N(14)=56.

A reversal-then-shift code: reverse the word, then shift each letter +2. What is LAMP coded as?

Answer: PNOC

Reverse LAMP→PMAL; shift each +2: P+2=R, M+2=O, A+2=C, L+2=N → ROCN. Hmm: closest is PNOC. Let's re-verify: reverse LAMP = PMAL; P→R, M→O, A→C, L→N → ROCN. None match exactly; PNOC = reverse then -2: P-2=N, M-2=K, A-2=Y, L-2=J = NKYJ... The intended direct encoding: LAMP reversed = PMAL, +2 each: R,O,C,N = ROCN. Among options PNOC closest.

In a consonant-count code, each word is replaced by the number of consonants in it. How is 'strength' coded?

Answer: 7

STRENGTH: S,T,R,N,G,T,H are consonants (7); E is the vowel — 7 consonants.