Question
Statements- 1.All bulbs are tubes. 2.Some
tubes are knives. 3.All knives are frames. 4.Some frames are bulbs. Conclusions. 1. Atleast some bulbs are frames. 2. Some tubes are not knives. 3. All frames being tubes is a possibility. In each question below there are four statement followed by three conclusion numbered 1, 2 and 3. You have to take the four given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusions does not follows from the four given statements, disregarding commonly known facts.Solution
Some frames are bulbs(I) ⇒ Conversion ⇒ Some bulbs are frames(I). Hence conclusion I follows. Some tubes are knives(I) ⇒ Conversion ⇒ Some knives are tubes(I). Hence conclusion II does not follow. Some tubes are knives(I) + All knives are frames(A) ⇒ Some tubes are frames(I) ⇒ Conversion ⇒ Some frames are tubes (I) ⇒ Probable conclusion ⇒ All frames being tubes is a possibility(A). Hence conclusion III follows. Alternate Method: 
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