These are decimal numbers, and dots above some of the digits make them recurring decimals. One dot means the digit under it repeats infinitely. In other words, it goes on forever (and ever and ever).

Converting between fractions, decimals and percentages is a useful problem-solving skill. The data can be more easily ordered by size when written in the same format. Calculations often give a decimal ...

Mastering integers, fractions, decimals, surds, and indices is crucial for excelling in the Quantitative Aptitude section of the CAT exam. A strong command over these fundamental mathematical concepts ...