Can you pass this 1970s quiz?
In 1978, Louise Brown became the first child to . . .
Vote at the age of 18
Survive poliomyelitis
Get a Nobel prize
Be born via in vitro fertilisation
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Mathematics
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10 people get on an empty bus. At the next stop, 5 people get off and twice as many people get on as at the 1st stop. At the 3rd stop, 25 get off. How many people are on the bus?