If 21x = 79x, what is the value of x?

I have branches, but no fruit, trunk or leaves. What am I?

What occurs twice in a week, once in a year but never in a day?

Why 1729 is a magic number? Answer Logically.

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

How many triangles are there in the picture below?

A gardener planted the Lemon trees in a mathematical ordered way (i.e. he planted a tree in rows).
He created a total of 19 rows of trees.

Note: There should be more than 2 trees to count as a row.

What is the minimum number of trees required by the gardener to have 19 rows of trees?

Replace the question mark with the correct number in the below-given picture?