Find the next number in the series: 8, 16, 32,

(3984 ÷ 24) x (5862 ÷ 40) = ?

1200 - 60 X 6 + 30 = 30 X 20 + ?

(18 x 3) + (36 x 8) = ? + 10

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? 

72% of 400 – 23% of 1020 = 120% of ? 

Evaluate: (936 ÷ 12) × (225 ÷ 15) − (144 ÷ 12) × 18

26 ² – 13% of 400 + (529 ÷ 23 ² ) = ? ² 

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

(320 ÷ 8 + 22) × 4 = 60 + 40% of ?

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

44% of (750 - 350) + ?% of 540 = √625 X 20