Spot 5 differences in two Christmas tree below:

If your uncle’s sister is not your aunt, what relation is she to you?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

You are given a set of weighing scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other. The 12 marbles appear to be identical. 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more. Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

An ant is travelling on a 1-meter-long rope at 1 cm/second but also the entire rope is being stretched by an extra 1 meter/second. Is it possible for the ant to reach at the end of the rope?

How can one talk without saying a single word?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?