Who launched a book in Gujarati 'Swadhinata Sangram Na Surviro' ?

25.6% of 250 +√ ? = 119

(0.85 % of 405 ) + (2.25 % of 550 )=?

$$ {4\over 7}×{2{4\over 5}} ÷{2\over 5}=?$$

How many bits are there in hexadecimal code:

Writing set of instruction to run a software

Who has become the youngest woman to receive the Presidential Medal of Freedom, America's highest civilian award? 

Which bank has signed an MoU with the Indian Air Force (IAF) to manage the salary accounts of the defence personnel ?