Which tank will fill first?

If your uncle’s sister is not your aunt, what relation is she to you?

What will you call your mother's brother's brother-in-law?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?