By which of the following biological processes, harmful

Which among the given operators should replace the “%” (in the same order) in the given expression below:

9 % 14 % 9 % 90 % 42 % 15

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

24 * 2 * 16 * 2 * 13 = 53

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

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

225 + 5 × 3 ÷ 5 – 7 = 133

What is the code for ‘it’?

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