Olympiad Test: Coding And Decoding - Class 5 MCQ

In this code, each letter is replaced by its position in the alphabet:

• B = 2
• O = 15
• A = 1
• T = 20

So, the word "BOAT" is written as 2, 15, 1, 20.

Given that each letter shifts two places forward in the alphabet, let's break it down correctly:

• H → J
• E → G
• A → C
• T → V
• E → G
• D → F

So, the correct code for HEATED is JGCVGF.

Answer: B

Based on the analysis:

• From Statement 1: MPN = Lake is Blue, so M stands for Blue.
• From Statement 2: OMR = Blue Big Bright, since M is already Blue, O must stand for Big.
• From Statement 3: KRN = Moon is Bright, so R stands for Bright.

Therefore, O stands for Big, which means the correct answer is D. None of these since the option for "O" is not provided.

Let's analyze the pattern:

• For TWENTY = 863985:
  T = 8, W = 6, E = 3, N = 9, T = 8, Y = 5

• For ELEVEN = 323039:
  E = 3, L = 2, E = 3, V = 0, E = 3, N = 9

It appears that each letter is assigned a specific number. Now, applying the same pattern to TWELVE:

• T = 8
• W = 6
• E = 3
• L = 2
• V = 0
• E = 3

So, TWELVE = 863203.

Answer: B

According to the given relationship rules:

• (1 + 2) means 1 is the mother of 2.
• (1 - 2) means 1 is the brother of 2.
• (1 x 2) means 1 is the father of 2.

Now, let's analyze the expression Z - R x K - Q:

• Z - R means Z is the brother of R.
• R x K means R is the father of K.
• K - Q means K is the brother of Q.

This forms the relationship: Z is the brother of R, R is the father of K, and K is the brother of Q. Therefore, K is the nephew of Z.

So, the correct answer is D.

Each letter is shifted forward by 1 position in the alphabet.

• H + 1 = I
• O + 1 = P
• U + 1 = V
• S + 1 = T
• E + 1 = F

Similarly, for GARAGE:

• G + 1 = H
• A + 1 = B
• R + 1 = S
• A + 1 = B
• G + 1 = H
• E + 1 = F

So, GARAGE is equal to HBSBHF.

Answer: D

Based on the given scheme, where:

• 1 → P
• 2 → L
• 3 → M
• 4 → N
• 5 → O
• 6 → G
• 7 → H
• 8 → E

Now, let's code 7 7 5 5 3 2 using the scheme:

• 7 → H
• 7 → H
• 5 → O
• 5 → O
• 3 → M
• 2 → L

So, the pattern 7 7 5 5 3 2 will be coded as H H O O M L.

Answer: D

We are given the following mappings between digits and letters in the code language:

• 39574 is written as XPLMD:

  • X corresponds to 3
  • P corresponds to 9
  • L corresponds to 5
  • M corresponds to 7
  • D corresponds to 4

• 0826 is written as TBNQ:

  • T corresponds to 0
  • B corresponds to 8
  • N corresponds to 2
  • Q corresponds to 6

Now, we need to decode DBMTX:

• D corresponds to 4
• B corresponds to 8
• M corresponds to 7
• T corresponds to 0
• X corresponds to 3

Thus, DBMTX is written as 48703 in the code language.

So, the correct answer is Option C (48703).

In the given code, OPPOSITE is written as 4TJUF.

From this, we observe that:

• "OPPO" is represented as 4.
• The remaining letters (S, I, T, E) are encoded by taking the immediate successor letters in the English alphabet.

Now, applying this pattern to OPPORTUNITY:

• "OPPO" is encoded as 4.
• The remaining letters are encoded by their immediate successors:
  • R -> S
  • T -> U
  • U -> V
  • N -> O
  • I -> J
  • T -> U
  • Y -> Z

Thus, OPPORTUNITY will be encoded as "4SUVOJUZ."

So, the correct answer is Option C (4SUVOJUZ).

In the given code, each letter is substituted with the next letter in the English alphabet:

• T -> U
• A -> B
• J -> K
• M -> N
• A -> B
• H -> I
• A -> B
• L -> M

Following this pattern, we can code LALKILA as:

• L -> M
• A -> B
• L -> M
• K -> L
• I -> J
• L -> M
• A -> B

So, LALKILA is coded as MBMLJMB.

Therefore, the correct answer is Option B (MBMLJMB).

In the given code, the digits are mapped to letters as follows:

• 14396 is written as PQSTR:

  • 1 → P
  • 4 → Q
  • 3 → S
  • 9 → T
  • 6 → R

• 7528 is written as DBAN:

  • 7 → D
  • 5 → B
  • 2 → A
  • 8 → N

Now, to write RDQNP in the code, we map the letters to their corresponding digits:

• R → 6
• D → 7
• Q → 4
• N → 8
• P → 1

Therefore, RDQNP is written as 67481.

So, the correct answer is Option D (67481).

We observe the pattern in the code:

• 'Go away' is written as NIGPGM:

  • G → N
  • O → I
  • A → G
  • W → P
  • A → G
  • Y → M

• 'Action stop' is written as GDSQIHTSIC:

  • A → G
  • C → D
  • T → S
  • I → Q
  • O → I
  • N → H
  • S → T
  • T → S
  • O → I
  • P → C

From this, it seems that each letter is shifted in a certain pattern. Applying a similar shifting pattern to 'station':

• S → T
• T → S
• A → G
• T → S
• I → Q
• O → I
• N → H

Thus, 'station' is written as TSGSQIH.

So, the correct answer is Option A (TSGSQIH).

The pattern involves subtracting 1 and adding 1 alternately to the digits of the number.

Given:

• 516852 is written as 425943:
  • 5 → 4 (5 - 1)
  • 1 → 2 (1 + 1)
  • 6 → 5 (6 - 1)
  • 8 → 9 (8 + 1)
  • 5 → 4 (5 - 1)
  • 2 → 3 (2 + 1)

Now, to code 357261 using the same pattern:

• 3 → 2 (3 - 1)
• 5 → 6 (5 + 1)
• 7 → 6 (7 - 1)
• 2 → 3 (2 + 1)
• 6 → 5 (6 - 1)
• 1 → 2 (1 + 1)

So, the code for 357261 is 266352.

Therefore, the correct answer is Option D (266352).

Based on the analysis, we observe the following patterns:

• LOW is coded as 468:

  • L → 4
  • O → 6
  • W → 8

• BOW is coded as 687:

  • B → 6
  • O → 8
  • W → 7

• SOWS is coded as 6338:

  • S → 6
  • O → 3
  • W → 3
  • S → 8

From these codes, we see that OW is consistently represented by 68. We also deduce:

• S → 3 (from "SOWS")
• L → 4 (from "LOW")
• B → 7 (from "BOW")

So, for BOWLS:

• B → 7
• O → 8
• W → 7
• L → 4
• S → 3

Therefore, the code for BOWLS is 83647.

Thus, the correct answer is Option B (83647).