Which Number is the odd one out?

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

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What work can one never finish?

A California farmer owns a beautiful pear tree. He supplies the fruit to a nearby grocery store. The store owner calls the farmer to see how much fruit is available for him to buy. The farmer knows the main trunk has 24 branches. Each branch has exactly 12 boughs and each bough has exactly 6 twigs. Since each twig bears one piece of fruit, how many plums will the farmer be able to deliver?

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?

In the Thar desert, 3 men found a big 24L Jar is full of water. Since there is a shortage of water so they decided to distribute the water among themselves such that they all have equal amounts of it. But they only have a 13L, a 5L and an 11-litre Jar.

How do they do it?

What two things can you never eat for breakfast?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

You need to move three matchsticks to form three squares. Can you do it?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?