A bank customer had $100 in his account. He then made 6 withdrawals. He kept a record of these withdrawals, and the balance remaining in the account, as follows:

Withdrawals Balance left
$50 $50
$25 $25
$10 $15
$8 $7
$5 $2
$2 $0
----- -----
$100 $99

Why are the Totals not tallying?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

Which tank will fill first?

Can you count the number of triangles in the picture below?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

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

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

What does below pictogram mean?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

I have feet, but no legs. Which animal Am I?