Browse exam-wise, subject-wise, and country-wise MCQs with explanations.
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A guarantees B and B guarantees C.
Therefore, A guarantees C.
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The contrapositive of P→Q is not-Q→not-P.
It is logically equivalent.
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Squaring each input and adding one gives all outputs.
The same rule fits every pair.
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Of six total orders, half place A before B.
The valid orders are ABC, ACB, and CAB.
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At least one is 60+50-20=90.
Therefore, 10 like neither.
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The conditions form the chain S<P<Q<R.
Only S, P, Q, R satisfies it.
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Exactly one forbids selecting both together.
The other selections contain one of the pair.
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All labels are wrong, so the Mixed-labeled box contains one pure fruit type.
One draw identifies it and the rest follow by elimination.
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An odd number of toggles reverses the starting state.
Seventeen is odd, so the lamp is on.
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The hands point in opposite directions.
They form a straight angle of 180°.
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The hands are two hour marks apart.
Two times 30° equals 60°.
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Each hour mark is 30°.
The hands are three marks apart, giving 90°.
