প্রদত্ত সমীকরণটি সঠিক করতে কোন দুটি চিহ্নের বিনিময় করা উচিত?

117 ÷ 13 + 16 × 540 - 40 = 644

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SSC CGL 2023 Tier-I Official Paper (Held On: 14 Jul 2023 Shift 4)
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  1. ÷ এবং +
  2. + এবং ×
  3. - এবং +
  4. ÷ এবং -

Answer (Detailed Solution Below)

Option 2 : + এবং ×
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Detailed Solution

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1. ÷ এবং +

117 + 13 ÷ 16 × 540 - 40 = 644

⇒ 117 + 0.8125 × 540 - 40 = 644

117 + 438.75 - 40 = 644

555.75 - 40 = 644

⇒ 515.75 - 40  644

2. + এবং ×

117 ÷ 13 × 16 + 540 - 40 = 644

× 16 + 540 - 40 = 644

144 + 540 - 40 = 644

684 - 40 = 644

⇒ 644 = 644

3. - এবং +

117 ÷ 1316 × 540 + 40 = 644

9 - 8640 + 40 = 644

49 - 8640 = 644

⇒ -8591 ≠ 644

4. ÷ এবং -

117 - 13 + 16 × 540 ÷ 40 = 644

⇒ 117 - 13 + 16 × 13.5 = 644

⇒ 117 - 13 + 216 = 644

333 - 13 = 644

⇒ 320 ≠ 644

সুতরাং, ‘+ এবং ×’ সঠিক উত্তর।

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