Mensa IQ Test Mensa IQ Coding and Decoding 4 — Questions and Answers
Question 1: In a code, APPLE → BQQMF (each letter +1). What is GRAPE coded as?
- HSBQF (Correct answer)
- HSAQF
- HSBRF
- ITBQF
Correct answer: HSBQF
G+1=H, R+1=S, A+1=B, P+1=Q, E+1=F → HSBQF.
Question 2: RACECAR backwards is RACECAR. Which code technique produces the same output for this word?
- Reversing the word (Correct answer)
- Caesar shift +1
- Mirror alphabet
- Vowel substitution
Correct answer: Reversing the word
RACECAR is a palindrome; the only listed technique that preserves it is reversing — palindromes read the same forward and backward.
Question 3: If word 'sun' = 19-21-14 and 'moon' = 13-15-15-14, what word is 19-20-1-18?
- STAR (Correct answer)
- SPAR
- STAY
- STAB
Correct answer: STAR
S=19, T=20, A=1, R=18 → STAR.
Question 4: In a shift code, LEMON = OHPRQ. What is the shift?
- +3 (Correct answer)
- +2
- +4
- +5
Correct answer: +3
L+3=O, E+3=H, M+3=P, O+3=R, N+3=Q — each letter advances 3 positions.
Question 5: Using the code A=1, B=2, C=3, …, Z=26, what is the sum of the codes for 'ACE'?
- 9 (Correct answer)
- 8
- 10
- 7
Correct answer: 9
A=1, C=3, E=5; 1+3+5=9.
Question 6: A code swaps vowels in sequence: A→E, E→I, I→O, O→U, U→A. What does BASIC code to?
- BESOC (Correct answer)
- BISOC
- BESIC
- BISIC
Correct answer: BESOC
B stays, A→E, S stays, I→O, C stays → BESOC.
Question 7: In a letter-number-letter pattern: B2D means 'skip 2 letters after B to get D'. What does G3K represent?
- Skip 3 letters after G to reach K (Correct answer)
- Add 3 to G's position
- Multiply G by 3
- Reverse of G3K
Correct answer: Skip 3 letters after G to reach K
G, skip H-I-J (3 letters), land on K — the number indicates how many letters to skip.
Mensa IQ Test Mensa IQ Coding and Decoding 4
In a code, APPLE → BQQMF (each letter +1).
What is GRAPE coded as?