Which is used to delete any file or folder in Windows permanently?

Richter scale is used to measure the magnitude of ___________.

Select the most appropriate option to substitute the underlined segment in the given sentence.
 Sahana worked late last night and could be able to finish her homework. 

In △ABC, right angle at B, if   $$tan\ A={1\over 2}$$, then the value of $$sinA(cosC+cosA)\over cosC(sin C-sinA)$$ is :

Select the option that is related to the fourth term in the same way as the first term is related to the second term and the fifth term is related to the sixth term.
 11 : 91 :: ? : 154 :: 15 : 127

Directions: In each of the following questions which of the answer figures is exactly the mirror image of the given figure when the mirror is held at AB?

Question Figure:

A bicycle, marked at ₹ 2,000 is sold with two successive discount of 20% and 10%. An additional discount of 5% is offered for cash payment. The selling price of the bicycle at cash payment is

Directions: In each of the questions given below four words are given in bold. These four words may or may not be in their correct position. The sentence is then followed by options with the correct combination of words that should replace each other in order to make the sentence grammatically and contextually correct. Find the correct combination of the words that replace each other. If the sentence is correct as it then select option (e) as your choice.

NATO ally world (A) leads the Turkey (B) in the journalists (C) of number (D) jailed.