Can you make four (4) nines (9) equal 100?

Can you find the hidden animal in the picture below?

What goes up but never comes down?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

What does this rebus mean?

O
N
C
E
TIME

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?