Our IQ test

1. If it takes 2 bricklayer 4 hours to build a wall how long does it take 4 bricklayers to build the same wall?

2. If some Gloogs are Toogs and no Toogs are Doogs than absolutely no Gloogs are Doogs.Is this statement true?

3. 60 - 20 x 3 = ?

4. Who painted the Mona Lisa?

5. (9 - 9) x 9 = ?