A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

In the Mexico City area, there are two Houses H1 and H2. Both H1 and H2 have two children each.
In House H1, The boy plays for Mexico Youth academy and the other child plays baseball.
In House H2, The boy Plays soccer for his school in Mexico and they recently have a newborn.

Can you prove that the probability of House-H1 having a girl child is more than that of House-H2?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

Which Travels Faster? Solve below famous picture riddle:

If 21x = 79x, what is the value of x?