A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

What is the next number in the series?

15 29 56 108 208 ?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

There is something which is always coming but never arrives?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?