(0.49)4 x (0.343)4 ÷ (0.2401)4 = (70 ÷

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

1. 3
2. 1
3. 4
4. 7
5. None of the above

Correct Option: B

(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