List of top Quantitative Aptitude Questions on Decimals

A number \( x = 3.1212121212\ldots \). By what least number should we multiply \( x \), so that we obtain an integer?
The value of 0.18 (with the 1 and 8 repeating) is equal to:
Solve: \( 0.003 \times 0.0004 \) = ?
Column AColumn B
\((0.01)(0.07)(70)\)\(0.49\)