All MCQs

The sides 3, 4, and 5 satisfy the Pythagorean theorem.
An angle of 90° also directly identifies a right triangle.

Statement I shows a exceeds b by 3, so a > b.
Statement II alone permits either a or b to be larger.

A number divisible by 4 is even, and a number divisible by 2 is even.
Therefore, either statement independently answers the question.

Statement I gives only an age difference, and Statement II gives only Sara's age.
Together they show Ali is 14 years old.

Statement I directly gives x = 7.
Statement II allows many positive integers and is not sufficient.

The stated reason directly links access difficulties to postponement.
The stronger claims are not supported.

More buses reduce congestion only if they replace some private-vehicle trips.
That behavioral change is necessary for the plan's logic.

Ruling out alternative explanations strengthens the claim that training caused the decline.
The other facts do not address competing causes.

Fame in acting does not establish expertise in nutrition science.
The endorsement is not reliable scientific evidence.

The conclusion is repeated in the reason without independent support.
The argument assumes what it is trying to prove.

The contrapositive of incorrect password → denial is no denial → not incorrect.
This follows if the stated rule fully applies.

The rule says arming is sufficient for the light, not that it is the only cause.
Affirming the consequent would be invalid.