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

If 7 × 8 = 49, 4 × 4 = 12 and 6 × 4 = 18, what will 9 × 6 be?

Which two signs should be interchanged to make the given equation correct?
 48 ÷ 12 × 3 + 5 − 4 = 21

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

If ‘A’ denotes ‘+’, ‘B’ denotes ‘×’, ‘C’ denotes ‘–’ and ‘D’ denotes ‘÷’, then what will come in place of ‘?’ in the following equation?
 71 A 3 B 2 C 6 B (65 D 13) C 7 B4 =?

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 = 25 and 8 + 4 = 80, then, 3 + 2 = ?

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

By interchanging the given two signs and numbers which of the following equation will be correct?
 + and –, 2 and 4

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 78 * 43 * 2 * 56 * 27 * 4