Which is Odd One Out and why?

4377

3954

9862

8454

9831

Solve this riddle by finding the odd one out from the rest.

Can you start the fire using two pieces of wood?

Can you make a six-letter word using the letters N, A and B ?

Can you find the key in the picture below?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

I am an odd number. Take away a letter and I become even. What number am I?

Three logicians went to bar for having a drink. The bar person asks the logicians "Do they all want to have the drink?". The first logician replied, " I don't know". The second logician replied, " I don't know". What is the reply of the last logician?

No matter how little or how much you use me, you change me every month. What am I?