The effectiveness of many chemical preservatives depends

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

24 and 9

In how many different ways can the letters of the word 'COMPUTER' be arranged in such a way that the vowels always come together?

In a given code form:

P + Q means P - Q

P ÷ Q means P × Q

P × Q means P + Q

P - Q means P ÷ Q

If P means ‘multiplied by’, T means ‘subtracted from’, M means ‘added to’ and B means ‘divided by’, then 40 B 8 P 8 T 14 M 9 = ?

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

9 % 14 % 9 % 90 % 42 % 15

If + denotes ÷, × denotes -, - denotes ×, and ÷ denotes +, what is the value of the following expression:

124 + 4 × 5 – 6 ÷ 6 + 3 = ?

If + means −, − means ×, × means ÷, and ÷ means +, what will be the value of the following expression?

19 ÷ 14 + 8 – 12 × 3

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