Their days may be numbered Airlines are running out of four-digit numbers for flight designations, but their computer systems are hard-coded for no more than four digits.

With 10,000 possible combinations for a four-digit PIN, it should be quite difficult for anyone to guess your PIN. However, as Mr Moore points out, bad cybersecurity habits make things a lot ...

14-year-old Aaryan Shukla from India, last month broke the world record for the Fastest time to mentally add 100 four-digit numbers - 30.9 secLeaves you dazed & bewildered.Congratulations Aaryan ...

The results found that out of the 3.4 million pins examined, many people incorporated simple patterns in their security code. The most common four-digit pins: 1234 1111 0000 1212 7777 1004 2000 ...

So now we have, you know, 10 times as many numbers.” The University Registrar’s Office has provided students and faculty with a Course Number Equivalency Report, which includes the old three-digit and ...

You will need to calculate using a column method, which is another name for long multiplication. This will allow you to multiply up to 4-digit numbers by 2-digit numbers.

A Münchhausen number is one that equals the sum of its digits raised to each digit's power. Since 0^0 is not well-defined, the only Münchhausen numbers are 1 and 3435 = 3^3 + 4^4 + 3^3 + 5^5 ...