What's the best place to go shopping in the ocean?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

During which month do people sleep the least?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

Why is Saturday stronger than Monday?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?