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

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

If 12 × 16 = 188 and 14 × 18 = 248, then find the value of 16 × 20 = ?

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 = ?

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 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.
 50 * 2 * 3 * 30 * 10 * 40 * 20

Which of the following interchange of numbers and signs would make the given equation correct?
 10 − 4 ÷ 20 + 16 × 8 = 16