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?

Can you find a five letter word that is left with only two letters if one is removed?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

How many triangles can you count in the figure given?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Count the number of triangles in the picture below:

If we tie a Sheep to one peg, a circled grass is been eaten by the Sheep. If we tie the Sheep to two pegs with a circle on its neck, then an eclipse is eaten out of the grass by the Sheep. If we want an eclipse then we put two pegs and then put a rope in between them and the other end of the rope is tied up on the Sheep's neck.

How should we tie the peg and the Sheep so that a square is eaten out from the garden grass? We only have one Sheep rope and the peg and the rings.

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

I am an odd number. Take away a letter and I become even. What number am I?