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Answer:
Hey Alex! Queen Messy here!
Tom's Granny is 58 years old. Let's see why: First child born: Granny is 19, Second child born: Granny is 23 (19 + 4), Third child born: Granny is 27 (23 + 4), Fourth child born: Granny is 31 (27 + 4), Fifth child born: Granny is 35 (31 + 4), Sixth child born: Granny is 39 (35 + 4), Sixth child is 19: Granny is 58 (39 + 19)
Step-by-step explanation: