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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
Three shopkeepers each make one true statement and one false statement.
Shopkeeper 1:
• Dog had black hair
• Dog had a long tail
Shopkeeper 2:
• Dog had a short tail
• Dog wore a collar
Shopkeeper 3:
• Dog had white hair
• Dog had no collar
Find correct description.
Solution
Test each option — each shopkeeper must have one truth + one lie.
Test Option (3) Black hair, long tail, A collar
Shopkeeper 1:
Black hair → TRUE
Long tail → TRUE ❌ (two truths → invalid)
Test Option (4) Black hair, long tail, No collar
Shopkeeper 1:
Black hair → TRUE
Long tail → TRUE ❌ (invalid)
Test Option (1) White hair, short tail, No collar
Shopkeeper 1:
Black hair → FALSE
Long tail → FALSE ❌ (two lies → invalid)
Test Option (2) White hair, long tail, A collar
Shopkeeper 1:
Black hair → FALSE
Long tail → TRUE ✔ (1 true, 1 false)
Shopkeeper 2:
Short tail → FALSE
Collar → TRUE ✔
Shopkeeper 3:
White hair → TRUE
No collar → FALSE ✔
All satisfy exactly one true + one false.
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