Logical Reasoning & Mental Ability • Topic Practice Hub
Coding-Decoding (ADRE Questions & PYQ Solutions)
Practice official ADRE solved questions and previous year paper sets for Coding-Decoding. Includes step-by-step solutions and explanations. Explore 8 questions collected from official SLRC ADRE Grade 3 & Grade 4 papers.
Total MCQs
8
Official PYQs
8
Subject
Logical Reasoning & Mental Ability
Format
Bilingual MCQs
Solved MCQs & Official Answer Explanations
ADRE 2024 • 2024 Paper 1Question 1
If ROCKET is written as TQEMGV, then what would be the last letter when RAINBOW is written by the same code?
A.Z
B.Y ✓ (Correct)
C.A
D.U
Explanation: Pattern: Each letter is shifted forward by +2 positions ($R\to T, O\to Q, C\to E$). For RAINBOW, the last letter W shifted by +2 gives Y ($W + 2 = Y$).
ADRE 2024 • 2024 Paper 1Question 2
If A=26, B=25, and so on till Z=1, then what would be the sum of STAR?
A.32
B.67
C.50 ✓ (Correct)
D.55
Explanation: Reverse alphabetical values: S = 8, T = 7, A = 26, R = 9. Sum = $8 + 7 + 26 + 9 = 50$.
ADRE 2024 • 2024 Paper 1Question 3
If the code for WATER is 67 and for DRINK is 56, then the code for RIVER is:
A.48
B.98
C.72 ✓ (Correct)
D.35
Explanation: Alphabetical positions sum: WATER ($23+1+20+5+18 = 67$), DRINK ($4+18+9+14+11 = 56$). For RIVER: $18 + 9 + 22 + 5 + 18 = 72$.
ADRE 2024 • 2024 Paper 2Question 4
In Pellamy, their words for blue, green, black and red colours are green, black, red and blue respectively. At sunset time in Pellamy, what would you say the colour of the sun is?
A.Blue ✓ (Correct)
B.Red
C.Green
D.Black
Explanation: The sun at sunset is red. In Pellamy, the word representing 'red' is 'blue'[cite: 3].
ADRE 2024 • 2024 Paper 2Question 5
If POND is coded as ONMC, then how will LAKE be coded?
A.MBLF
B.EKAL
C.PELA
D.KZJD ✓ (Correct)
Explanation: Pattern: Each letter is shifted -1 position in the alphabet ($P \to O, O \to N, N \to M, D \to C$). LAKE shifted -1: $L \to K, A \to Z, K \to J, E \to D$ (KZJD)[cite: 3].
ADRE 2024 • 2024 Paper 2Question 6
If MAN = 182, then CAT = ?
A.96
B.60 ✓ (Correct)
C.138
D.120
Explanation: Alphabet numerical values: M=13, A=1, N=14. Product = $13 \times 1 \times 14 = 182$. For CAT: C=3, A=1, T=20. Product = $3 \times 1 \times 20 = 60$[cite: 3].
ADRE 2024 • 2024 Paper 3Question 7
If ROBOTICS is coded as OROBITSC, then PROJECTS would be coded as
A.ROPEJTSC
B.RPJOCEST ✓ (Correct)
C.RPJOECST
D.ROJPCEST
Explanation: Swapping adjacent letter pairs: PR->RP, OJ->JO, EC->CE, TS->ST yields RPJOCEST[cite: 5, 6].
ADRE 2024 • 2024 Paper 3Question 8
If REAR = 42, TEAR = 44 and DEAR = 28, then which of the following sets is incorrectly paired?
A.PEAR = 40
B.FEAR = 32 ✓ (Correct)
C.BEAR = 26
D.GEAR = 31
Explanation: Sum of alphabetical positions: F(6)+E(5)+A(1)+R(18) = 30. The given pair FEAR = 32 is incorrect[cite: 5, 6].
Want to Solve Full Official ADRE Mock Tests?
Test your timed performance under real SLRC exam conditions.
Start Free Full Mock Test →