If 1+9+8=1, what is 2+8+9?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

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

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

I have an eye but still cannot see.

Who am I?

Count the Triangle in the figure given below:

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

I have no life, but I can die. What am I?