Can you count the number of triangles in the given figure?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

A B C D E F G H

These are the letters given to you. Now you have to find out the letter that comes two to the right of the letter which is immediately to the left of the letter that comes three to the right of the letter that comes midway between the letter two to the left of the letter C and the letter immediately to the right of the letter F.

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

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

Can you find out which number multiplied by itself will give the output as 12345678987654321?

What is next number in the pattern below:

131 517 192 123 ?

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

Can you find out which options fits best with the missing column?

When monkey rotate the gear, which mark will be hit 1 or 2 ?