By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

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 is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not.

Is a married person looking at an unmarried person ?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

How can one talk without saying a single word?

What does this rebus mean?

O
N
C
E
TIME

Find the next number in the sequence

1, 2, 6, 21, 88, __?

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

Whats the next number in the below number sequence pattern.