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

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?

By interchanging the given two signs which of the following equation will be not correct?
 – and × 

Which of the following symbols should be placed in the blank spaces respectively (in the same order from left to right) in order to complete the given expression in such a manner that “D < A” definitely holds True?
A __ B __ C __ D

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

What will be the value of the given expression if ‘A’ means ‘+’, ‘B’ means ‘–’, ‘C’ means ‘×’, and ‘D’ means ‘÷’?
 35 A 25 B 12 C 25 D 5 

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 96 * 6 * 24 * 49 * 25

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