Mensa IQ Test Mensa IQ Coding and Decoding 3

Question 1

In a code, NORTH is written as 14-15-18-20-8. What is SOUTH in this code?

Accepted Answer

19-15-21-20-8

Answer

Each letter is represented by its position: S=19, O=15, U=21, T=20, H=8.

Question 2

If BOOK is coded as 2-15-15-11, how is READ coded?

Accepted Answer

18-5-1-4

Answer

R=18, E=5, A=1, D=4 — each letter's alphabet position.

Question 3

A number-to-letter cipher: 1=Z, 2=Y, 3=X … 26=A. What does 8-15-12-4 decode to?

Accepted Answer

SOLD

Answer

Reversed alphabet: 8=S(26−8+1=19? No—1=Z means 1↔26: 8→26−8+1=19=S), 15→26−15+1=12=L, 12→26−12+1=15=O, 4→26−4+1=23=W. Re-check: 1=Z(26), 2=Y(25), so n → letter at position (27−n). 8→19=S, 15→12=L, 12→15=O, 4→23=W → SLOW.

Question 4

If A=2, B=4, C=6 (each letter = 2× its alphabetical position), what is the code for CAB?

Accepted Answer

6-2-4

Answer

C=3→6, A=1→2, B=2→4, so CAB = 6-2-4.

Question 5

In a code: FIRE = GJSF and WIND = XJOE. What is RAIN in the same code?

Accepted Answer

SBJO

Answer

Each letter shifts +1: R→S, A→B, I→J, N→O → SBJO.

Mensa Practice Test Practice Test

Mensa Practice Test Practice Test

Mensa IQ Test Mensa IQ Coding and Decoding 3