What is the term for malicious software designed to

12 × 6 + 24 – 36 of 5 + 160 = ?

What will come in the place of question mark (?) in the given expression?

? = {1026 ÷ 54 + 17 × 13 – (384 ÷ 24)} 

136% of 560 - 2/7 of 630 + 45% of 420 =?

(160 × 12 - 13 × 20)/(120 × 2 + 2 × 35 + 2 × 11) = ?

Find the value of 'p' in the given expression: 15 of 6 ÷ p x 4 = 30.

Ravi is 12 years younger than Surya. Ravi's age is 40% of the sum of his and Surya's age. What will be Surya's age 9 years hence? 

If x + y + 3 = 0, then find the value of x³ + y³ – 9xy + 9.

? % of 1200 = 20% of 30% of 3600