pls give ur opinion and why. thanks.

Mischievous and identical twins>>>>NO
Not mischievous but identical>>>> No harm unless one is more brilliant.
Two of them, Olodos>>>>Yes. Class go sweet die. One gives a silly answer and when you think the other would help out, he gives you a more silly answer.
Two of them, brilliant>>>>separate classes might be the best

NB. Not all twins like to be separated and might resist every attempt at that. In that case, however good/bad they are, keep them together. If you don't want their wahala.

bIt is advisable to seperate them so they can build themselves up individually. When the are always together, one especially the smaller one is disadvantaged. She will always be following the footsteps of the other twin thereby making her not to be herself bt living the life of her sister.