Is the iddat of an elderly lady the same as the iddat of a young woman?

Answer

If the elderly woman is a woman of haidh, her iddat is the same as the iddat of a young woman. If she is not a menstruating woman, i.e. she is beyond the age of haidh, her Talaaq iddat will be three months. But her iddat-e-wafaat (i.e. death of her husband) will remain four months and ten days.