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(0.49) 4 x (0.343) 4 ÷ (0.2401) 4 = (70 ÷ 100) ? + 3

Correct Answer: 1

Explanation:

(70 ÷ 100) ? + 3 = (0.49)4 x (0.343)4 ÷ (0.2401)4
(0.7) ? + 3 = (0.49 x 0.343/0.2401)4
(0.7)? + 3 = (0.7)4
On comparing the exponents both sides, we get
? + 3 = 4
∴ ? = 4 - 3 = 1


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