By interchanging the given two signs and numbers which of the following equation will be correct?
 – and +, 6 and 3

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
20 * 2 * 50 * 5 * 115

By interchanging the given two signs and numbers which of the following equation will be correct?
 + and ×, 1 and 2

If ‘+’ means ‘÷’, ‘ ̶ ’ means ‘+’, ‘×’ means ‘ ̶ ’ and ‘÷’ means ‘×’, what will be the value of the following expression?
 [{(32 × 20) - (2 ÷ 3)} + (2 - 4)] ÷ 3

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

If 10 – 3 = 12, 12 – 4 = 13, 14 – 5 = 14, then 16 – 6 = ?

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 41 * 4 * 39 * 73 * 25 * 4 * 30

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

After interchanging the given two numbers and two signs what will be the values of equation (I) and (II) respectively?
× and ÷, 7 and 9

I. 8 × 3 ÷ 6 + 9 – 7
II. 9 – 7 × 1 + 6 ÷ 3