Can you find the six hidden animals in the picture below?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Before Mount Everest was discovered, what was the highest mountain in the world?

You are given a set of weighing scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other. The 12 marbles appear to be identical. 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more. Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light

Replace the question mark with the correct number below.

Can you find the thief by just looking at the picture below?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

A blonde put eyeliner on her head. Why?

I have branches, but no fruit, trunk or leaves. What am I?