By interchanging the given two signs and numbers which of the following equation will be not correct?
 ÷ and ×, 1 and 3

Which of the following interchanges in signs will make the given equation correct?

17- 15 x 5 = 250

If the mathematical operators, ‘+’ and ‘×’ are interchanged, what will be the value of the equation 9÷ 5+10–23×2

If M denotes ‘−’, N denotes ‘÷’, O denotes ‘×’ and P denotes ‘+’, then what will come in place of ‘?’ in the following equation?
(38 O 13) N 19 M 27 P (38 O 3) P 43 M 68 = ?

In the following question, correct the equation by interchanging two signs.
9 x 3 + 8 ÷ 4 – 7 = 28

Which of the following interchanges of numbers and mathematical signs would make the given equation correct?
 729 × 81 ÷ 20 + 16 − 6 = 50

If ‘+’ means ‘×’, ‘-’ means ‘÷’, ‘×’ means ‘+’ and ‘÷’ means ‘-’ then what is the value of a given equation?
225 ÷ 5 + 96 – 3 × 31 

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 25 *5 * 10 * 2 * 4 * 10