Which of the following interchange of mathematical signs would make the given equation correct?
 20 ÷ 4 × 8 + 16 − 15 = 11

Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
 17 * 11 * 42 * 2 * 7 = 18

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 16 * 4 * 8 * 10 * 2 *24

Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
 57 * 35 * 44 * 11 * 13 *74

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 37 * 3 * 21 * 79 * 18 * 4 * 19

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 25 * 4 * 6 * 2 * 17

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 93 * 65 * 3 * 56 * 14 * 40

 By interchanging the given two signs and numbers which of the following equation will be not correct?
 × and –, 8 and 4
 I. 4 + 3× 8 – 2 ÷ 1 = 3
 II. 8 × 2 – 4 + 6 ÷ 2 = 11