The half-life of Radium is 1600 years. The fraction of a sample of radium that would remain after 6400 years is

Plants are made disease resistant with

The proverb “Fools rush in where angels fear to tread” is quoted from

Rima is the heroine of the novel “Green Mansions” written by

I ...... to him yesterday.

Read the passage and select the most suitable sentence from the alternatives logically and language wise

Mankind’s most valuable treasure of thoughts is carefully preserved in the golden casket of books. All this rich source of knowledge, inspiration and guidance is with in the easy reach of those with care to be a little hard working and studious, and who understand the methods which yield the rich harvest of fruitful ideas