Which is Odd One Out and why?

4377

3954

9862

8454

9831

What word does this rebus represent?

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How many triangles are there in the picture below?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?