A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

Prove that the below maths equation is true.

8 + 8 = 91

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

There are forty elephants and they have forty-fore heads. How can this be possible?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Solve this riddle by finding the odd one out from the rest.

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?