Which Indian cricketer is known as "Brown Bradman"?

What book was published by Florence Nightingale in 1860?

Where was the Year of the Great Stink (1858) which led to the installation of an efficient underground sewage system?

What was the first National lottery held in England intended to raise money for?

What nationality was Paul René Gauguin ( grandson of Impressionist painter Paul Gauguin), painter, graphic artist.......

What nest at Sandy Cape, the most northern point on Fraser Island off the coast of Queensland, Australia................

What is the second longest named river in the USA, which runs from Lake Itasca, Minnesota, to the Gulf of Mexico?

When did the first underground segment of the New York City Subway open, connecting New York City Hall with Harlem?

A 2 stroke engine, used in such devices as chainsaws, is fuelled by a mixture of petrol and what other liquid?

Which country, once part of the Republic of Gran Colombia under Simon Bolivar, became independent in 1830...............

A merchant has 640 kg of sugar, part of which he sells at 2% loss and the rest at 6% profit. He gains 3% on the whole. What is the difference between the quantities of sugar sold at 2% loss and that sold at 6% profit?

160 kg

x*0.98+(640-x)*1.06=640*1.03 => x=240 kg, 640-x=400 kg the difference = 400-240=160 kg

A merchant has 1925 kg of sugar, part of which he sells at 3% loss and the rest at 4% profit. He gains 2% on the whole. What is the difference between the quantities of sugar sold at 4% profit and that sold at 3% loss?

A merchant has 310 kg of sugar, part of which he sells at 2% loss and the rest at 8% profit. He gains 5% on the whole. What is the difference between the quantities of sugar sold at 8% profit and that sold at 2% loss?