Question : What should come in place of the question mark (?) in the following mathematical statement? $\sqrt{19 \times 650 \div 13+18.5 \times 4} \times 13=?$
Option 1: 416
Option 2: 418
Option 3: 413
Option 4: 415
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Correct Answer: 416
Solution : $\sqrt{19 \times 650 \div 13+18.5 \times 4} \times 13$ $=\sqrt{19 \times 50+18.5 \times 4} \times 13$ $=\sqrt{950+74} \times 13$ $=\sqrt{1024} \times 13$ $=32 \times 13$ $=416$ Hence, the correct answer is 416.
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Question : Select the number that will come in place of the question mark (?) in the following mathematical statement. 49 × 57 – 41 × 18 = (?)2 × 3 + 1380
Option 1: 15
Option 2: 21
Option 3: 3
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Option 2: 2
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Option 1: 5
Option 2: 7
Option 3: 8
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Option 1: 10
Option 2: 17
Option 3: 12
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