Which of the following interchanges in signs and numbers will make the given equation correct?

8 x 9 + 2 = 74

Select the correct combination of mathematical signs to sequentially replace the # signs and to balance the given equation.
 [{(44 # 38) # (2 # 5)} # (4 # 2)] # 5 # 10

Which two signs and two numbers should be interchanged in the following equation to make it correct?
 14 × 6 ÷ 12 + 15 − 9 = 203

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

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

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

        64 + 7 = 460

        43 + 8 = ?

        25 + 8 = 212

Select the c orrect combination of mathematical signs to replace the * signs and to balance the given equation.
 78 * 3 * 12 * 5 * 59 * 17 * 44 

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