GATE Questions

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Here the given series 28, 12, 4, 2, -2 follows a pattern that

$$\begin{gathered} 28 \\ 28 - 24 = 28 - 16 = 12 \\ 12 - 23 = 12 - 8 = 4 \\ 4 - 22 = 4 - 4 = 0 (NOT 2) \\ 0 - 21 = 0 - 2 = -2 \end{gathered}$$

Hence, the odd man in the given series is 2.

Materials that allow electricity to flow are called electrical conductors and that materials which does not allow electricity to flow are called Insulators.

The letter 'P' sounds same as the vegetable 'PEA'.

Hence P is an alphabet which is a vegetable.

Colloids include gels, sols, and emulsions; the particles do not settle, and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.

These Colloid substances consists of ultramicroscopic particles of one substance dispersed through another substance from which we cannot separate them.

Sugar water is not a colloid and it is a solution in which we can separate them.

The aim of science is to get an understanding of the natural world, while the aim of technology is to use that understanding to improve people's lives. 

Hence, Advances in science can lead to new technology.

The basic concept in economics is that all resources are limited.

Anything which is circular shape has no beginning, no middle or no end. 

The food like donuts have no beginning, end or middle. 

The person one who is fond of fighting is known as Bellicose.