Follow BODMAS rule to solve this question, as per the order given below, Step-1-Parts of an equation enclosed in 'Brackets' must be solved first, Step-2-Any mathematical 'Of' or 'Exponent' must be solved next, Step-3-Next, the parts of the equation that contains 'Division' and 'Multiplication' are calculated, Step-4-Last but not least, the parts of the equation that contains 'Addition' and 'Subtraction' should be calculated. Given expression: 572 + 38 × 0.5 = ? + 10 ⇒ ? + 10 = 572 + 19 ⇒ ? = 591 – 10 ⇒ ? = 581 Hence, the required number in place of question mark is 581.