Spot 5 differences in two Christmas tree below:

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Why Wine Glass Stem is so long?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

Solve the mathematical equation in the picture below.

What is the largest number you can write with just 3 digits?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

Count the number of balls in picture below:

There are 100 bulbs in a room. 100 strangers have been accumulated in the adjacent room. The first one goes and lights up every bulb. The second one goes and switches off all the even-numbered bulbs - second, fourth, sixth... and so on. The third one goes and reverses the current position of every third bulb (third, sixth, ninth? and so on.) i.e. if the bulb is lit, he switches it off and if the bulb is off, he switches it on. All the 100 strangers progress similarly.

After the last person has done what he wanted, which bulbs will be lit and which ones will be switched off?

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