2. Some equations are solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis. 5 x 4 x 3 = 70 , 6 x 5 x 4 = 140 7 x 6 x 5 = ?
6. Two motorcyclists P and Q start from the same point. P rides 11 km West, then turns South and rides 16 km, then turns to his right and rides 14 km. Q rides 30 km South, then turns to his right and rides 25 km. Where is Q with respect to P now?
10. In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question? 45 x 5 - 24 + 3 ÷ 80 = ?