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

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

What makes this number unique: 8,549,176,320?

How many Watermelons are there in the below picture?

What is common among 11, 69, and 88?

Can you find the missing piece of the Porsche?

What does below rebus means ?

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

Why Aeroplane windows are round?