Who is the author of the book 'Territorial Geography of Rajasthan'?

Directions: Which of the phrases (A), (B), (C) and (D) given below each sentence should replace the phrase printed in bold type to make the sentence grammatically correct. If the sentence is correct as it is, mark (E), i.e., 'No correction required' as the answer.

When he fell down the ditch, he shouted with all his might so that to catch someone’s attention.

The LCM of two numbers is 495 and their HCF is 5. If the sum of the numbers is 100, then their difference is: 

Which version of SWAYAM online portal was recently launched in India?

Which among the following noble gas has highest molar mass?

Sum of the factors of 4b²c²-(b²+c²-a²)² is : 

In these questions read each sentence to find out whether there is any error in it. If there is no error, the answer is (D).

The scissors that you asked for (A) / is in the desk drawer (B)/ in the bedroom.(C)/ No error (D).

Four years ago, the respective ratio between the age of Ram and that of Sonu, was 4 : 9. Tina is ten years older than Ram. Tina is ten years younger than Sonu. What is Tina's present age?