If eleven plus two equals one, what does nine plus five equal?

Can you find out the missing number in the grid?

Spot 5 differences in two Christmas tree below:

John was piloting a plane behind a car but was never able to overtake it. Why?

I don't get anymore wetter, no matter how much rain falls on me.

A California farmer owns a beautiful pear tree. He supplies the fruit to a nearby grocery store. The store owner calls the farmer to see how much fruit is available for him to buy. The farmer knows the main trunk has 24 branches. Each branch has exactly 12 boughs and each bough has exactly 6 twigs. Since each twig bears one piece of fruit, how many plums will the farmer be able to deliver?

There was a blind beggar living on the footpath of a street. Suddenly one day, the beggar's brother died. What was the relation of the blind beggar with the person who died?

PS: Brother is not the answer.

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

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?

Be active and find the killer in the picture Riddle below.