Which word does the below Plexor means ?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

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

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

Why is it very easy to weigh a fish?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?