Replace the question mark with the correct number in below Picture:

How many triangles can you find in this given picture?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Which five letter word can be added at the end of below word to form a
valid word?

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We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

A river should be crossed by a father, a mother and their two sons and two daughters.
There are some rules that should be followed while crossing the river. There can be only two people in the raft while crossing. The daughters cannot be with their father unless there is the presence of the mother. The sons cannot be with their mothers unless the father is present. Unless the guard is on the board, the criminals cannot be with any of the family members. Only the adults like the father, the guard, and the mother knows to use the raft.

How will they cross the river?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?