Puzzle 201
What day would tomorrow be if …
… yesterday was five days before the day after Sunday's tomorrow?
Puzzle Copyright © Kevin Stone
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Hint
Try working backwards.
Answer
Saturday.
Reasoning
It's best to work backwards:
"Sunday's tomorrow"
is Monday.
"the day after Sunday's tomorrow"
is therefore Tuesday.
"five days before the day after Sunday's tomorrow"
is therefore Thursday.
"yesterday was five days before the day after Sunday's tomorrow"
yesterday was Thursday, making today Friday. Therefore, tomorrow is Saturday.
Puzzle 202
Using only horizontal and vertical lines, connect every number to its pair (1 goes to 1, 2 goes to 2, etc). The lines must not cross each other.
Note: this puzzle is not interactive, and the squares cannot be clicked.
Puzzle Copyright © Johan de Ruiter
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Answer
Puzzle 203
During a recent club trip to the seaside, I sat at the rear of the bus.
I noticed a strange thing: Ann, Kevin, Matilda, and Nathaniel were all sitting on the left side of the bus.
Even more curious was the fact that Jack, Amelia, Isabella, and Maximilian were all sitting on the right side of the bus.
On which side was James sitting?
Puzzle Copyright © Kevin Stone
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Hint
Look at the lengths of the names.
Answer
James was sitting on the left.
Members with an odd number of letters in their name sat on the left, and members with an even number sat on the right.
Puzzle 204
Yesterday I went for a short bicycle ride around the local lakes. As the weather was very hot, I rode in shorter stages than I'd normally ride.
In Stage One, I rode half of the overall distance.
Stage Two saw half of the remaining distance plus 35 metres covered.
Stage Three covered three-quarters of the remaining distance.
Stage Four completed half of the remaining distance, plus 75 metres.
Stage Five completed the journey with a final burst of 150 metres.
How far did I cycle in total?
Puzzle Copyright © Kevin Stone
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Hint
Try working backwards.
Answer
7,340 metres.
Reasoning
Stage 5's clue tells us that 150m was left. So the distance left at the start of Stage 4 must have been:
Dist4 = Dist4 + 75 + 150
—————
2
Which simplifies to give Dist4 = 450m.
Stage 3's clue tells us that 450m was one quarter of the remaining distance, so Dist3 = 1,800m.
Stage 2's clue tells us that the distance at the start of Stage 2 was:
Dist2 = Dist2 + 35 + 1800
—————
2
Which simplifies to give Dist2 = 3,670m.
Stage 1's clue tells us that 3,670m was half the overall distance, which means the entire ride was 7,340m.
Double-Checking
Starting with 7,340m:
Stage 1: cycled 3,670m, leaving 3,670m
Stage 2: cycled 1,870m, leaving 1,800m
Stage 3: cycled 1,350m, leaving 450m
Stage 4: cycled 300m, leaving 150m
Stage 5: cycled 150m, leaving 0m
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