Count the number of lines in the image below ?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Replace the question mark with the correct number in the below-given picture?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

What word is pronounced the same if you take away four of its five letters?

What has many keys but can’t open a single lock?

Where do you go to learn how to make ice cream?

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

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?