Riddles, one at a time
Old Phone Keys: 4663
Which of the four words types 4663?
Find each digit's letters on the keypad. Only one of the four fits.
HOME
H is on 4, O on 6, M on 6, E on 3: 4663.
What comes next? 2, 6, 12, 20, 30, ?
Growing Gaps
Look at how far apart the numbers are.
42
The gaps grow by two each time: +4, +6, +8, +10, then +12. 30 + 12 = 42.
I am a three-digit number. My three digits are all different, and they multiply to 6. I am even, and I am less than 200. What number am I?
The Even Number
Which three different digits multiply to 6?
132
Different digits that multiply to 6 can only be 1, 2 and 3. Below 200 means starting with 1: 123 or 132. Only 132 is even.
Mirror Odometer: 29992
11 km
The next mirror number is 30003, just 11 km on.
Five Weekends
What day of the week is the 1st?
How many days must the month have for 3 days of the week to come 5 times?
Friday
31 days = 4 weeks + 3 days, and those 3 extra days start the month: Friday, Saturday, Sunday.
Mirror Clock: The Long Wait
4 hours 11 minutes
16:61, 17:71, 18:81 and 19:91 are not real times. The next is 20:02, 4 h 11 min after 15:51.
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