What was the original name given to the planet

After interchanging "×" and "÷", "7" and "4", which of the following equations becomes correct?

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

24 * 2 * 16 * 2 * 13 = 53

Which two signs should be interchanged in the following equation to make it correct:

490 ÷ 70 + 5 × 28 – 15 = 48

If ‘A’ means (÷), ‘B’ means (×), ‘C’ means (+), and ‘D’ means (-), then ____ is the value of the expression.

If 'A' means ' X ', 'B' means '÷', 'C' means '+' and 'D' means ' - ', then what will come in the place of '?' in the given expression?

If “+” means “minus”, “×” means “divided by”, “÷” means “plus”, and “-“ means then “multiplied by”

If '%' means (+), '#' means ( - ), '@' means ( X ), and '&' means (÷), then what is the value of the expression:

80 % 110 & 5 @ 9 # 104

By interchanging the given two numbers (not digits), which of the following equations will be correct?

24 and 15

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

56 * 492 * 6 * 7 * 123 = 507

Given below an equation having four blanks you have to check from the alternatives which among the given is correct?

21 _ 51 _ 7 _ 12 _ 75