There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Which Number is the odd one out?

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

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

How many letters are in the alphabet?

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

Find the next number in the sequence

5 12 24 36 ?

Next Number in the Series,

5, 16, 49, 104, ?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

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