Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

By using 'because' continuously three times, can you make an English statement ?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

You can see three almost identical images below. Can you spot the odd one out from them?

Which is the smallest number that you can write using all the vowels exactly once?

What does Alexander the Great and Winnie the Pooh have in common?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

People put me on the table and cut me but do not eat me. What am I?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.