Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

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

How can this be possible?

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

What happened when the wheel was invented?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

What four weights can be used to balance from 1 to 30 pounds?

Two fathers and two sons decided to go to a shop and buy some sweets upon reaching. Each of them bought 1 kg of sweet. All of them returned home after some time and found out that they had 3kg of sweets with them.

They did not eat the sweets in the way, nor threw or lose anything. Then, how can this be possible?

The centre of the third figure is empty. What digit should fit inside?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

Why is Saturday stronger than Monday?