John is the son of Jacob. So, Jacob is the_____of John's father?
The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?
What does below science rebus mean? Ag Ag Ag Ag SPOON Ag Ag Ag Ag
People make me, save me, change me, raise me. What am I?
How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?
When you say goodbye, I am what you need to tie. I come as a couple and go wherever you run. Who am I?
Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one? 5 $ 4 $ 3 $ 9 = 4215 6 $ 9 $ 2 $ 6 = 3816 4 $ 7 $ 3 $ 3 = 1122 7 $ 2 $ 7 $ 4 = ____
I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?
Can you arrange four 9's and use at most 2 math symbols, to make the total 100?
What has a ring but no finger?
How many letters are in the alphabet?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
