The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs, EXCEPT one. Find that odd number pair.

Which two signs should be interchanged to make the given equation correct?

312 – 13 × 14 + 207 ÷ 4 = 539

Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.

32 * 14 * 18 * 9 * 12 * 22

Study the given pattern carefully and select the number that can replace the question mark (?) in it.

(3, 9, 2)

(8, 6, 8)

(5, 3, ?)

(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)