# User Forum

Subject :IMO    Class : Class 3

How many triangles are there in the given figure?

A18
B19
C20
D21

so hard

## Ans 1:

Class : Class 6
the ans should be D

## Ans 2:

Class : Class 3
Answer is 20 option b ,but there is a mistake in the solution, but final answer is c.

Class : Class 6

Class : Class 5
c

## Ans 5:

Class : Class 5
SOF you don't know addition 12 9 = 21

## Ans 6:

Class : Class 3
There is a mistake.9 4 5 1 2=21. The 9 should have been 8.Then only 20 will come.

Class : Class 6

## Ans 8:

Class : Class 3
The solution in the left side should be 8 triangles not 9.

## Ans 9:

Class : Class 3
Sof you don,t know addition 12 9=21

## Ans 10:

Class : Class 3
Sof really doesn't know addition true, but i am sure it is just a printing mistake

## Ans 11:

Class : Class 5
Actually ans IS C but you have given wrong explanation why.In the biggest triangle there are 5 triangles

Class : Class 5

Class : Class 1

Class : Class 3

Class : Class 7

Class : Class 4

Class : Class 6

Class : Class 5

Class : Class 4