Prime Minister Narendra Modi has emerged as the most followed world leader on photo-sharing app Instagram with a whopping 6.9 million followers. Who was on second position in the list ?

One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill tank in 36 min, then the slower pipe alone will be able to fill the tank in ?

Compound interest earned on a sum for the second and the third years are Rs.1200 and Rs.1440 respectively. Find the rate of interest ?

The average weight of a group of boys is 30 kg. After a boy of weight 35 kg joins the group, the average weight of the group goes up by 1 kg. Find the number of boys in the group originally ?

Two pipes A and B can separately fill a cistern in 60 min and 75 min respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes are simultaneously opened, then the cistern is full in 50 min. In how much time, the third pipe alone can empty the cistern ?

96 is divided into two parts in such a way that seventh part of first and ninth part of second are equal. Find the smallest part ?

Find the one which does not belong to that group ?

Which social networking site officially launched "Express Wi-Fi" internet services in India ?