Given 2 log₁₀ x + 1 = log₁₀ 250, find :

(i) x

(ii) log₁₀ 2x

If log₂ (log₃ x) = 4, the value of x is :

1. 3¹⁶

2. 16³

3. 3 × 16

4. 16 ÷ 3

If log (5x - 4) - log (x + 1) = log 4, the value of x is :

1. 6

2. 8

3. 4

4. 12