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

9 + 3 − 4 ÷ 5 × 2 = 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 24 × 2 = 84, and 32 × 3 = 69, then 13 × 3 = ?

By interchanging the given two signs which of the following equation will be not correct?
 + and –

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 67 * 88 * 8 * 14 * 3 * 19 * 17

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

Which two numbers from amongst the given options should be interchanged to make the given equation correct?
 248 ÷ 4 + 184 ÷ ( 4 × 6 – 2 × 8) = 77

 By interchanging the given two signs and numbers which of the following equation will be not correct?
 × and –, 8 and 4
 I. 4 + 3× 8 – 2 ÷ 1 = 3
 II. 8 × 2 – 4 + 6 ÷ 2 = 11

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 16 * 4 * 8 * 10 * 2 *24