19 is only 1 away from 20, so you prefer to start by multiplying 20 times 5, which equals 100. Then we need to take away a squadron of 5, because there are actually only 19 squadrons, not 20. 100 take ...

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

Helping students to develop math fluency takes more than just flash cards. It requires teaching them how to think about ...

You can find the difference between two numbers in more than one way. You can count up from the smaller number to the larger number. Or, you can count back from the larger number to the smaller number ...

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

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).

The interstate system isn’t random. Odd roads run north-south, while even run east-west. But there are a few exceptions and ...

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

The innovation dividend represents the durable value AI brings by enabling new products, services and revenue channels.

The Mega Millions estimated jackpot for Tuesday’s drawing was a whopping $800 million. The winning numbers were 11, 14, 17, ...

A visual puzzle challenges you to find two hidden numbers, 58 and 33, amidst a sea of 53s within 12 seconds. This exercise ...