Which two signs need to be interchanged to make the following equation correct?

9 + 3 − 4 ÷ 5 × 2 = 9

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 25 * 4 * 6 * 2 * 17

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

If 24 × 2 = 84, and 32 × 3 = 69, then 13 × 3 = ?

Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
 17 * 11 * 42 * 2 * 7 = 18

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 37 * 3 * 21 * 79 * 18 * 4 * 19

If ‘A’ denotes ‘+’, ‘B’ denotes ‘×’, ‘C’ denotes ‘–’ and ‘D’ denotes ‘÷’, then what will come in place of ‘?’ in the following equation?
 71 A 3 B 2 C 6 B (65 D 13) C 7 B4 =?

Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
 57 * 35 * 44 * 11 * 13 *74

Which of the following interchange of mathematical signs would make the given equation correct?
 20 ÷ 4 × 8 + 16 − 15 = 11