These are the initial letters from the nursery rhyme 'Jack and Jill went up the hill'. The letters represent 'and Jill came tumbling after'.
A man builds a house with all 4 sides facing south.
A bear walks past the house.
What colour is the bear?
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Hint: Where on Earth can all sides face South?
The house must be at the North Pole and therefore the bear is a Polar Bear and hence white.
Sally Smith was born on December 25th, 1971, yet her birthday is always in the summer. How is this possible?
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Hint: She can't have been born in the USA then.
She lives in Australia, but she could have been born anywhere South of the equator, where the seasons are reversed.