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, and in the bracket, Step-2- Any mathematical 'Of' or 'Exponent' must be solved next, Step-3- Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated, Step-4- Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated. Given expression is, (1472.2 ÷ 23.13)1/3 + (71.8 × 2.05)1/2 = (?)1/2 Taking the approximate values, 1472.2 ≈ 1472, 23.13 ≈ 23, 71.8 ≈ 72, 2.05 ≈ 2 ⇒ (1472 ÷ 23)1/3 + (72 × 2)1/2 = (?)1/2 ⇒ (64)1/3 + (144)1/2 = (?)1/2 ⇒ 4 + 12 = (?)2 ∴ ? = 4