Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

There are 3 apples in the basket and you take away 2. How many apples do you have now?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

By moving just one matchstick, you need to make the below statement true. Can you do it?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

I have eight fingers and two thumbs but I do not live. What Am I?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

Make a sentence consisting of three words that have the whole alphabet.