The average of the square of first five even natural

Which of the following interchange of sign would make the given equation correct?

45 × 9 + 5 ÷ 4 = 25

What will come in place of ‘?’ in the given expression?

12 × 12 + 10² + 24 × (5/4) = ?

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

225 + 5 × 3 ÷ 5 – 7 = 133

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

168 * 8 * 7 * 34 * 94 = 256

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

36 – 36 ÷ 9 + 8 × 4 = 8

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

8 – 42 + 15 × 20 ÷ 4 = 346

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