Riddles, one at a time
What Am I? The Grey Trail
Which object fits all three clues?
Think about the colour of the mark each one leaves.
Pencil
It gets shorter as it works, leaves a grey trail and has lead inside: B.
Fewest Tokens: Pay 11
Which tokens pay 11 with the fewest tokens?
Biggest first is not always fewest. Try every pair.
5 + 6
Just 2 tokens. Biggest first, 9 + 1 + 1, needs 3.
Dim or Bright
What number does the last row show?
First find each lamp's value: the top row gives the left lamp.
22
The top 3 rows give lamp values 9, 3 and 1. Bright counts double: 18 + 3 + 1 = 22.
Hands Apart: 9:45
What is the SMALLER angle between the hands?
The hour hand moves 30° each hour. How far has it gone after 45 minutes?
22.5°
The minute hand is on 9; the hour hand is 3/4 of the way to 10: 3/4 × 30° = 22.5°.
Stack the Stones
Which number belongs on the top brick?
44
20 - 9 = 11, 13 + 11 = 24, then 24 + 20 = 44.
Mirror Odometer: 29992
11 km
The next mirror number is 30003, just 11 km on.