The hardware superstore is selling the paint I want at “3 tins for the price of 2”. This weekend I can get a further 20% off with my loyalty card. What will be the overall reduction from the full price if I buy three tins of paint this weekend?

Ibelieve it is d but i may be wrong

Forensic inspection of the rom or persistent memory does not include overwritten or erased text files e-mails sent web sites visited recently password-protected records

Idon’t know the answer

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)