Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

Why do we preferably have round manhole covers and not square ones?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

The more of this there is, the less you see. What is it?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

What runs around the whole yard without moving?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

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

I’m tall when I’m young, and I’m short when I’m old. What am I?