"Having four equal sides is a necessary condition for a quadrilateral to be a square, but it is not sufficient." This means:

"If a person is highly educated, then he earns well." Then which of the following options is necessarily correct?

Read the following statements: A few mechanics are not plumbers. All plumbers are qualified. No qualified is skilled. Conclusions: I. No skilled is a plumber. II. No mechanic is skilled. III. Some pl…

A cube has numbers 1 to 6 written on its faces. The sum of opposite faces is not constant. If faces showing (1,2,3) meet at a corner, which number is opposite 1 if 4 is opposite 2?

In this question, a statement is followed by two assumptions: Statement: Though he is fat yet he runs fast. Assumptions: I. Fat people have weak muscles. II. Fat people generally cannot run fast.

In an examination, Raj got more marks than Moti but not as many as Meena. Meena got more marks than Ganesh and Rupali. Ganesh got less marks than Moti but his marks are not the lowest. Who is second…