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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


Ans 1:

Class : Class 7
I agree with Ahmad

Ans 2:

Class : Class 10
I agree with Ahmad

Ans 3:

Class : Class 8
I also agree with Ahmad

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.

Ans 8:

Class : Class 7
please explain the answer in details

Ans 9:

Class : Class 7
I agree with Ahmad.

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.

Ans 12:

Class : Class 7
IT IS 6 RIGHT?

Ans 13:

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

Ans 14:

Class : Class 10

Ans 15:

Class : Class 8
answer should be 6

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

Ans 18:

Class : Class 8
Correct answer is 5.

Ans 19:

Class : Class 7
I agree with Ahmad

Ans 20:

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

Ans 21:

Class : Class 8
Please Someone explain

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

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