A little-known strategy lets couples earn twice the rewards on the same grocery spending -- here's how it works.

For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

Most of us have little trouble working out how many milliliters are in 2.4 liters of water (it's 2,400). But the same can't be said when we're asked how many minutes are in 2.4 hours (it's 144).

A new collection of research papers examines how humans conceptualize numbers and the numeral systems we’ve build around them ...

The winning numbers in Monday's drawing of the "Illinois Lotto Million 2" game were: You also can respond to a story: Submit a letter to the editor.

India's middle class is embracing budget travel, opting for shorter trips, smarter bookings, and domestic routes amidst ...