### Instruction: Three siblings are born 5 years apart, each. If the eldest child is 20 years old now, what's the total of the ages of the three siblings 10 years from now?### Response: Ten years from now, the elder child will be 20+10 = 30 years old.
If the elder child is 20 years old now, the second born is 20-5 = 15 years old, 5 years younger than the firstborn.
The second-born will be 15+10 = 25 years old ten years from now.
The third-born who is five years younger than the second born, will be 25-5 = 20 years old ten years from now.
If the elder child is 30 years old ten years from now, the total age of the three siblings will be 30+25+20 = 75 years.
The answer is 75