John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

I know a nine-letter word having only one vowel.
Do you ?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

How many triangles can you count in the figure given?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?