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

After interchanging the given two numbers and two signs what will be the values of equation (I) and (II) respectively?
– and ×, 6 and 4
 I. 7 × 6 + 8 ÷ 2 – 4
 II. 4 – 7 × 6 + 8 ÷ 2

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

3 × 5 × 7 × 2 = 24, 2 × 4 × 6 × 8 = 22, 4 × 4 × 8 × 9 =?

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 25 * 5 * 10 * 2 * 13

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 230 * 1 * 5 * 16 * 41 * 21

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 91 * 15 * 5 * 18 * 37

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

3 × 4 × 5 = 435

4 × 3 × 2 = 342

2 × 3 × 4 = ?

What will come in the place of ‘?’ in the following equation, if ‘+’ and ‘× ‘ are interchanged and also ‘5’ and ‘9’ are interchanged?
 3 + 9 – 6 × 5 ÷ 3 = ?