What is common among 11, 69, and 88?

Replace the question mark with the number below given a simple math problem.

What is next number in the pattern below:

131 517 192 123 ?

Replace the question mark in the picture below.

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

What do you see in the image below

Why is the Hole below a Lock?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

What you cannot hold but it is yours?

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