1.

(52.022 – 34.012) ÷ 17.99 × √? = 17201). 4002). 203). 254). 625

Answer»

Approximating the NUMBERS in the above EXPRESSION:

⇒ (522 – 342) ÷18 × √? = 1720

⇒ (52 + 34) × (52 – 34)18 × √? = 1720

⇒ (86 × 18) ÷ 18 × √? = 1720

⇒ 86 × √? = 1720

⇒ √? = 1720/86 = 20

∴ ? = 202 = 400


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