John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

What am I?

Can you find the six hidden animals in the picture below?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

You can hear me, but you can't touch or see me.

What am I?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

Can you fill the blank with the correct number?

6 30 870 756030 _____

How do you go from 98 to 720 using just one letter?