Sphalerite is an ore/mineral of

If '+' means '-', 'X' means '+', '-' means '÷', and '÷' means 'X', then what is the value of the following expression?

By interchanging the given two signs and numbers which of the following equation will be correct?

× and +, 6 and 4

If '!' means ' - ', '#' means '+', '%' means '÷' and '@' means ' X ', then what is the value of the following expression?

25 # 3 % 15 @ 35 ! 23

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

36 * 3 * 10 * 9 * 18

What will come in place of the question mark (?) in the following equation, if '+' and ' X ' are interchanged and '÷' and '-' are interchanged?

Which two signs need to be interchanged to make the following equation correct?

62 – 12 × 60 ÷ 12 + 30 = 92

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

620 + 75 ÷ 8 × 35 – 44 × 5 + 15 = 583

If '@' means '÷', '#' means ' X ', '$' means '+' and '%' means '-' then what would be the value of the expression given below?