In a certain language, if the signs + and ×, and the digits 3 and 8 are interchanged, then what is the value of the following expression?
 6 × 35 ÷ 5 + 8 – 9

Which of the following symbols should be inserted in place of question mark (?) respectively (in the same order from left to right) in order to complete the given expression in such a manner that ‘U > S’, ‘Q < T’ and ‘S ≤ N’ definitely holds true?
 U > T ? D ≥ S ? Q ? N

If the signs – and ÷ are interchanged, then which of the following equations would be correct?

By Interchanging the given two numbers which of the following equation will be not correct?
5 and 9

Direction: Some equations have been solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis.

If 4 + 3 = 25 and 8 + 4 = 80, then, 3 + 2 = ?

Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
 268 * 4 * 8 * 5 * 14 = 41

Select the correct combination of mathematical signs to replace the * signs and balance the given equation.
66 * 6 * 12 * 3 * 15 = 12

If I denotes ‘÷’, J denotes ‘×’, K denotes ‘−’ and L denotes ‘+’, then what will come in place of ‘?’ in the following equation?
 42 L 18 K (7 J 4) L (21 I 3) J 9 L 22 = ?