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Question

Directions: In the following question, the symbols $, @, #, & and % are used with the following meaning as illustrated below:

‘A $ B’ means ‘A is greater than B’.

‘A @ B’ means ‘A is smaller than B’.

‘A # B’ means ‘A is not smaller than B’.

‘A % B’ means ‘A is not greater than B’.

‘A & B’ means ‘A is neither smaller nor greater than B’.

Now in each of the following questions assuming the given statements to be true, find which of the conclusion/s given below them is/are definitely true?

Statement

C # G @ D; I % E @ F; F & D; J $ C # K

Conclusion

I. J & K

II. G $ E

III. K @ J

IV. I @ D

The correct answer is

Both Conclusions III and IV are true.

Understanding Symbolic Relationships

In these types of logical reasoning questions, specific symbols are used to represent different relational inequalities like greater than, smaller than, equal to, etc. The first step is always to translate these symbols into their standard mathematical inequality forms.

Symbol Meaning Inequality
$ is greater than >
@ is smaller than <
# is not smaller than
% is not greater than
& is neither smaller nor greater than =

Translating Symbolic Statements

Now, let's translate the given statements from their symbolic form into standard inequalities based on the meanings defined above.

  • Statement 1: C # G @ D → C is not smaller than G AND G is smaller than D. This translates to: C ≥ G AND G < D. Combined: C ≥ G < D.
  • Statement 2: I % E @ F → I is not greater than E AND E is smaller than F. This translates to: I ≤ E AND E < F. Combined: I ≤ E < F.
  • Statement 3: F & D → F is neither smaller nor greater than D. This translates to: F = D.
  • Statement 4: J $ C # K → J is greater than C AND C is not smaller than K. This translates to: J > C AND C ≥ K. Combined: J > C ≥ K.

Combining Inequality Chains

We have translated the statements into the following inequalities:

1) C ≥ G < D

2) I ≤ E < F

3) F = D

4) J > C ≥ K

Using Statement 3 (F = D), we can link the chains involving D and F. The combined chain becomes:

J > C ≥ K

And

C ≥ G < D = F > E ≥ I

Let's focus on the connections needed for the conclusions.

Evaluating Conclusions

We will now evaluate each given conclusion to determine if it is definitely true based on the combined statements.

Conclusion I: J & K

This translates to J = K.

From our combined statements, we have J > C ≥ K.

This relationship means J is strictly greater than C, and C is greater than or equal to K. Therefore, J must be strictly greater than K (J > K) or equal to K (J = K) if C=K, but since J > C is a strict inequality, J must be strictly greater than K. For example, if C=5 and K=5, J must be > 5. If C=6 and K=5, J must be > 6, and so J > K is true. The relationship J > C ≥ K means J is definitely greater than K.

So, J = K is not definitely true.

Conclusion I is False.

Conclusion II: G $ E

This translates to G > E.

From our combined statements, we have C ≥ G < D = F > E ≥ I.

We are looking at the relationship between G and E. We know G < D and D > E. This means both G and E are related to D, but their relationship to each other is not fixed. For instance, if D=10, G could be 8 and E could be 6 (G > E), or G could be 6 and E could be 8 (G < E). We cannot definitively say G > E.

Conclusion II is False.

Conclusion III: K @ J

This translates to K < J.

From our combined statements, we have J > C ≥ K.

As analyzed for Conclusion I, the relationship J > C ≥ K implies that J is definitely strictly greater than K. J > K means K < J.

Conclusion III is True.

Conclusion IV: I @ D

This translates to I < D.

From our combined statements, we have I ≤ E < F = D.

We know I ≤ E, E < F, and F = D. Combining these, we get I ≤ E < D. Since I is less than or equal to E, and E is strictly less than D, I must be strictly less than D.

Conclusion IV is True.

Summary of Conclusions

Based on our analysis:

  • Conclusion I (J = K) is False.
  • Conclusion II (G > E) is False.
  • Conclusion III (K < J) is True.
  • Conclusion IV (I < D) is True.

Therefore, both Conclusion III and Conclusion IV are definitely true.

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Important Questions from Coded Inequalities

  1. In the question two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements.

    Statements:

    P = U < M < K ≤ I > N

    Conclusions:

    I. N ≥ K

    II. I > P
  2. Statements:

    P # B $ T; R & B $ S; L % R # Q

    Conclusions:

    I. P # Q

    II. L & Q

    III. T % S

    IV. P # S

  3. Statement:

    R $ W % P; N & W # S; J % T @ N; K & T

    Conclusions:

    I. N # J

    II. P # S

    III. R @ P

    IV. W $ K

  4. Statement:

    R % X @ W; Y # Z # S; X & Z; W $ U & Y

    Conclusions:

    I. U $ X

    II. W # Y

    III. S @ R

    IV. W % Z

  5. Statement

    L % M # N; O @ Q % H; H & M @ R

    Conclusion:

    I. O $ L

    II. L % N

    III. O % R

    IV. L # O

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