सवेंरा

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? 

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

(18 × 8 ÷ 12) × 10 = ?

28 × 3.5 +25 × 3.2 = ? - 62

(16% of 550 – 22% of 700 + 45% of 800) = ?

7(1/2) – 3(5/6) = ? − 2(7/12)

Find the value of ?

{[(864 ÷ 18) ÷ 8] ÷ 3} + 11² – 2³ = ?

3/8 of 720 ÷ 15 + 12 = √?

58% of 3300 - ?% of 2900 = 1740