The Crimean Tatar's invasions of Russia began in 1507, after the death of Moscow's grand duke Ivan III, with the Crimean Khanate attacking the Russian towns of Belev and Kozelsk. Over the course of the 16th century, the outer border of the Wild Steppes was near the city of Ryazan, outside the Oka River. The main path for the invading forces to Moscow was the Muravsky Trail, running from the Crimean Isthmus of Perekop, between the basins of the Dnieper and Severskiy Donets rivers, and finally up to Tula. The Tatars would turn back only after extensive looting and kidnapping, the Tartars usually managed to penetrate 100-200 kilometers into Russian territory. Captives were subsequently sent to the Crimean city of Caffa to be sold into Slavery. As a result, the Russian population in the border regions suffered heavily. Each spring, Russia mobilized up to 65,000 soldiers for border service. The defensive lines consisted of a circuit of fortresses and cities. To protect from invasions by the Nogai Horde in the region between the Volga and Irtysh rivers, the Volga cities of Samara , Tsaritsyn , and Saratov were founded. The most damaging invasions occurred in 1517, 1521 , 1537 , 1552, 1555, 1570-72 , 1589, 1593, 1640, 1666-67 , 1671, and 1688.

How many Volga cities were founded to protect from invasions by the Nogai Horde?
A: 3

Coming off their divisional road win over the Chiefs, the Raiders went home for a Week 3 AFC West duel with the Denver Broncos. Oakland would trail in the first quarter as Broncos quarterback Kyle Orton completed a 2-yard touchdown pass to wide receiver Brandon Marshall, followed by kicker Matt Prater's 48-yard field goal. The Raiders would get on the board in the second quarter as kicker Sebastian Janikowski made a 48-yard field goal, yet Denver answered with Prater's 21-yard field goal. From here on out, the Broncos were in control as running back Knowshon Moreno got a 7-yard touchdown run in the third quarter and Prater nailed a 24-yard field goal in the fourth quarter.

How many more field goals did Matt Prater have than Sebastian Janikowski?
A: 2

The Melbourne Storm played two marquee games at the MCG in 2000. This was the first time that they had played outside of their normal home ground of Olympic Park Stadium which held 18,500 people. Their first game was held on 3 March 2000 against the St. George Illawarra Dragons in a rematch of the infamous 1999 NRL Grand Final. Dragons player Anthony Mundine said the Storm were not worthy premiers and they responded by running in 12 tries to two, winning 7010 in front of 23,239 fans. This was their biggest crowd they had played against until 33,427 turned up to the 2007 Preliminary Final at Docklands Stadium which saw Melbourne defeat the Parramatta Eels 2610. The record home and away crowd record has also been overhauled, when a match at Docklands in 2010 against St George attracted 25,480 spectators. Their second game attracted only 15,535 spectators and was up against the Cronulla Sharks on 24 June 2000. Once again, the Storm won 2216.

How many points did the Storm defeat the Eels by at the 2007 Preliminary Final at Dockland's Stadium?
A:
16