1. In this question, some equations are solved on the basis of a certain system. On the same basis find out the correct answer from amongst the four alternatives for the unsolved equation. 7 x 5 x 6 = 576, 4 x 2 x 5 = 245, 8 x 2 x 5 = ?
4. Some equations have been solved on the basis of a certain pattern. Find the correct answer for the unsolved equation on that basis. 8x7x6=765 5x3x2=421 9x6x4= ?
6. In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question? 75 - 5 + 25 ÷ 125 = ?