Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

By what process could you make a 'Tea-Table' into food?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

what does the below rebus means?

Prove that the below maths equation is true.

8 + 8 = 91

In a Society, there are over 100 flats.

Flat 1 is named the first flat.
Flat 2 is named the second flat.
Flat 3 is named the third flat. And So On.....

A visitor decides to walk through all the flats, and he finds all the flats except flat 62.
Anmol later founds that the locals of the town have given it another name.

What is the name of the Flat?

What is full of holes but still holds water?