Clean riddles

cleanwhat am I

We can be boring, Or interesting. We can be long, Or short. We can have pictures, Or just words. Many love us, But many also hate us. What are we?
Books.
65.94 %
79 votes
cleanlogic

If you have me, you want to share me. If you share me, you haven't got me. What am I?
Secret.
65.71 %
214 votes
logicmathcleansimple

In a supermarket, the first 25 customers of the day purchased an average of two items each. After a further 15 customers, the average number of items purchased by each customer rose to eight. What was the average number of items purchased by the last 15 customers only?
((15+25) x 8 - (25 x 2))/15 = 18
65.52 %
44 votes