Count the number of lines in the image below ?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

While preparing the table for dinner, wife came up with an idea to tease his mathematician husband. She asked her husband to pick nine toothpicks and make ten without breaking any toothpick.

The husband was also smart and did it within seconds. How ?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

Why is the Hole below a Lock?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

what does the below math rebus puzzle mean?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?