How can I transfer numbers from my sim card to my iphone?
How can you determine who called you from a 13 digit phone number?
What are some good questions to ask a mental health provider?
What are some jobs for mentally retarded people?
What do I need to know about getting and keeping a job for the mentally impaired?
What is the number one cause of mental problems?
What is the relationship between mental health and a spending spree?
For example: If you wanted to know 20 x 21, you'd quickly multiply 20 x 20 in your head and then add one more 20. What is that called?
In germany we call this head backing (Kopfstütze) like the thing that saves your head if you have a car crash.
When you use numbers that are close to the given numbers to estimate an answer, you are using "friendly numbers" they are sometimes called "amicable numbers. "
Security code is wrong! Please try again!