7, 11, 20, 36, 61,  ?

14 × 6 + 9 × 11 = (8² – 3) × ?

52% of 400 + √(?) = 60% of 600 - 25% of 400

What value should come in place of the question mark (?) in the following question?

Simplify-

x + 3(y + x – 2) – (x + y).

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

(55 × 8 + 28) × 10 = ?

Find the Value of  

36% of 540 – (45% of 7300) ÷ 75 =?

12 % of 72 × 25 – (x ÷ 20) × (16 ÷ 24) × 36 + 1/5 × x = (4 ÷ 12) × 36 ÷ 1/4

(1520 - 1350) ÷ (550 – 500) = ?