# User Forum

Subject :IMO    Class : Class 7

How many of the following letters have rotational symmetry of order more than 1?
R, B, F, H, O, P, S, W, X, Z, N

A 4
B 9
C 5
D 8

Class : Class 7

Class : Class 10

Class : Class 8

## Ans 4:

Class : Class 10
I think the thickness of the lines of X makes the answer 5

## Ans 5:

Class : Class 8
Yes, I too agree with Ahamad.

## Ans 6:

Class : Class 7
h,o,x,s,n i think it is the answer

## Ans 7:

Class : Class 7
It is 7 becoz B has rotational symmetry of order2.

Class : Class 7

Class : Class 7

## Ans 10:

Class : Class 7
I agree, it should be 6 - H, O, S, X, Z and N

## Ans 11:

Class : Class 8
The answer is six - H, O, S, X, Z and N.

Class : Class 7
IT IS 6 RIGHT?

## Ans 13:

Class : Class 6
Yes there are 6 letters I also agree with Ahmad

Class : Class 10

Class : Class 8

## Ans 16:

Class : Class 8
HOSXZNcan u give more option

## Ans 17:

Class : Class 7
There is a mistake.Actually there are 6 lettersThose are-H, O, S, X, Z, N

Class : Class 8

Class : Class 7

## Ans 20:

Class : Class 8
how it can be a 6 I think so, there is only 5 H,O,X,S and Z

Class : Class 8

## Ans 22:

Class : Class 7
It is five letters since H,O,S,X and Z

## Ans 23:

Class : Class 8
I agree . There are 6 letters with a rotational line of symmetry