What's a single-digit number with no value?
If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?
I add 5 to 9 and get 2. The answer is correct, so what am I?
Which letter of the alphabet has the most water?
Forwards I am heavy, backward I am not. What am I?
You see me once in June, twice in November, and not at all in May. What am I?
Until it is measured, not known. Yet how you miss it when it has gone. What is it?
Take one out and scratch my head, I am now black but once was red. What am I?
If your uncle’s sister is not your aunt, what relation is she to you?
No matter how little or how much you use me, you change me every month. What am I?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
