One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

Can you name some countries which do not have the alphabet 'A' in them?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

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?

What does this Rebus Picture mean?

No matter how little or how much you use me, you change me every month. What am I?

Find out the missing number in the picture attached:

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.