Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

what does the below rebus means?

What brings you down but never up?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Identify the 10 differences between the two given pictures.