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Instructions
What should come in place of the question mark (?) in the following questions?
Solution
Expression : $$\sqrt[3]{13824}\times\sqrt{?}=864$$
=> $$\sqrt[3]{2^3 \times 2^3 \times 2^3 \times 3^3} \times \sqrt{?} = 864$$
=> $$2 \times 2 \times 2 \times 3 \times \sqrt{?} = 864$$
=> $$\sqrt{?} = \frac{864}{24} = 36$$
=> $$? = 36^2 = 1296$$
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