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

. If, 4 × 3 = 14; 5 × 4 = 18; 6 × 5 = 22, then find the value of 7 × 6.

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 = ?

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

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.

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

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

If + means −, − means ×, × means ÷, and ÷ means +, what will be the value of the following expression?
 45 × 9 ÷ 12 – 5 + 3

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