Find out the plural of the nouns from the following.

Looker-on

In the following question below are given some statements followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which the given conclusion logically follows the given statements. 

Statements: 

Some schools are Laboratories. 

All Laboratories are theatres. 

Conclusion: 

I. Some theatres are schools. 

II. No school is a theatre. 

Select the option that will fill in the blank and complete the given series.
0 , 7, 26, 63,124, 215, 342, 511, 728,___

Which state has launched the Mission Shakti sports initiative?

Who among the following is appointed as the first Lokpal of India?

Which one of the following tree is a good source of gum?

Which of the following is used as retardant in nuclear reactor?