India, Aug. 17 -- Brain teasers have always been a favourite pastime for people who enjoy testing their wits. From riddles to optical illusions, these puzzles have a unique charm that keeps the mind engaged. Now, a fresh maths puzzle shared online has once again left internet users scratching their heads.

(Also read: Brain teaser: Can you spot the gift that made her frown in 10 seconds?)

The puzzle, posted on Brainy Quiz, reads:

"IQ Test:: 2 + 5 = 35, 5 + 8 = 104, 6 + 9 = ?"

Check out the puzzle here:

At first glance, the equations look incorrect, but that is exactly the trick. The challenge lies in identifying the hidden pattern that connects the numbers. Those who love cracking unusual number games are diving into the puzzle to wor...