२१ सेमी त्रिज्येचा धातूचा गोळा वितळवून त्यापासून २ सेमी बाजू असलेले किती घनाकृती तयार करता येतील?

Choose the correct question tag to fill in the blank.
I am the happiest man in my town, ________?

A hardware or software device that is able to modify data according to instructions is called a ________.
Choose the correct word from the following:

After the word, four meanings are given. Choose the correct alternative from the following:
Directory

Choose the correct meaning from the following:
'to dictate letters' mean

The underlined idiom in the following sentence means
People these days want to be rich overnight; naturally they try to earn money by hook or crook.