Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

Can you move 2 matchsticks to form four equal sized squares.

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

Spot 5 differences in two Christmas tree below:

A car is crossing a 20 km-long bridge. The bridge can support at most 1500kg of weight over it. If somehow, the weight on the bridge becomes more than that, it will break.

Now, the weight of the car is exactly 1500kg. At the midway, a bird comes and sits on the roof of the car. This bird weighs exactly 200 grams.
Can you tell if the bridge breaks at this point or not?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

Can you identify the hidden rebus in the image below?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?