Do You See It?

Can you count the number of triangles in the picture below?

Find the next number in the sequence

5 12 24 36 ?

Name a key which is hardest to turn.

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

A and B have a certain number of chocolates with them. If B gives one chocolate to A, they will have an equal number of chocolates. But if A gives one chocolate to B, then A will be left with half the number of chocolates that B has.

Can you find out the number of chocolates they have right now?

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?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Can you find out the remainder when 3^300 is divided by 5?

What Time Should the last watch show in the below figure?