Which of the following is not a type of mining? A)
Room and pillar mining
B)
Longwall mining
C)
Horizontal mining
D)
Solution mining

Answerarmed services vocational aptitude battery (asvab)

Psychologists often talk of the magical number "7" - so it is generally assumed that we can keep 7 (more or less, so 5-9 is the correct answer) items in our short term memory - we know this as a result of many experiments.

we can increase this by chunking, so for example "7 8 9 5 3" is harder to remember than "78 95 3" - try it yourself!

the answer is a)