What question can you never answer yes to?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

Can you Find and name the hidden bird in the picture below ?

What does this rebus photo means?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Can you identify the hidden rebus in the image below?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

What can go through glass without breaking it?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?