Randomly scramble the digits 0, 1, 2, 3, 4, 5 and 6 to form a seven-digit number (or a six-digit number if the leading digit is 0). Rank the following events in order ...

596 million. That's the number of WhatsApp users in India. At almost one-third of India's population, the figure stands testimony to the popularity of Facebook's almost ubiquitous messaging app in the ...