Who invented Vacuum Flask? 

Three of the following four numbers are alike in a certain way and one is different. Pick the number that is different from the rest.

Doldrums are characterized by

In a code language, BLUE in written as 4244210 and BODY is written as 430850. How will CALM be written as in that language?

The number of neutrons in ¹³Al₂₇ is

Select the related word from the given alternatives:

Medicine : Patient : : Education : ?

Identify the diagram that best represents the relationship among the given classes.
Music Instrument, Piano, Guitar

The non-permanent members of the UN Security Council are elected for