What numbers should go on the bottom line? 3 6 9 15 8 2 10 12 11 8 19 27 19 10 29 39 ? ? ? ?
Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?
I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?
A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?
Can you find the next number in the below sequence 3 , 7 , 10 , 11 , 12 , 17 ?
What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?
Complete the series by replacing "?" with the correct number. ST ND RD TH '?'
John can place six large boxes or nine small boxes into a carton. Can you find out in how many cartons can he place sixty-six boxes in total?
Prove that the below maths equation is true. 8 + 8 = 91
I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?
Quickly Solve this riddle 7 - 4 + 3 * 0 + 1 = ?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
