A
A little boy goes shopping and purchases 12 tomatoes.
On the way home, all but 9 get mushed and ruined.
How many tomatoes are left in a good condition?
9
The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).
51 and 15. 42 and 24. 60 and 06.
How do you make the number 7 even without addition, subtraction, multiplication, or division?
Drop the "S".
When my father was 31 I was 8.
Now he is twice as old as me.
How old am I?
The difference in age is 23 years, so I must be 23 if my father is twice as old as me.
You want to boil a two-minute egg.
If you only have a three-minute timer (hourglass),
a four-minute timer and a five-minute timer,
how can you boil the egg for only two minutes?
Once the water is boiling, turn the three-minute timer and five-minute timer over.
When the three-minute timer runs out, put the egg in the boiling water.
When the five-minute timer runs out, two minutes have elapsed and it is time to take the egg out of the water.
You don't need the four-minute timer for this riddle.
I add six to eleven, and get five. Why is this correct?
When it is 11 a.m., adding six hours makes it 5 p.m.
Using only addition, add eight 8's to get the number 1,000.
888 + 88 + 8 + 8 + 8 = 1,000
A 300 ft. train is traveling 300 ft. per minute must travel through a 300 ft. long tunnel.
How long will it take the train to travel through the tunnel?
Two minutes. It takes the front of the train one minute and the rest of the train will take two minutes to clear the tunnel.
How can you take 2 from 5 and leave 4?
F I V E
Remove the 2 letters F and E from five and you have IV.
Old Granny Adams left half her money to her granddaughter and half that amount to her grandson. She left a sixth to her brother, and the remainder, $1,000, to the dogs’ home. How much did she leave altogether?
$12,000
Adding one half, one quarter and one-sixth tells us that the total is a fraction of twelfths (2 + 4 + 6 = 12). You can also think about it as 6/12, 3/12, 2/12, which equals 11/12. If the remainder is $1,000, that must be one-twelfth, so the total is $12,000.
20+20+20=60. How can you make 60 again by using the same number 3 times, but it can’t be 20?
55+5=60
Lily is a lily pad in a small pond. Lily doubles her size each day, On the 20th day she covers the whole pond. On what day was Lily half the size of the pond?
Day 19, it's not 10 because on day 20 she doubled from day 19, so 19 must be half the size of the pond.
How many times can you subtract the number 5 from 25?
Once, because after you subtract it's not 25 anymore.
What single digit appears most frequently between and including the numbers 1 and 1,000?
Hint: Look for a pattern!
The most common digit is 1!
Every number 1–9 appears exactly the same number of times in every ten numbers. But because we included the number 1,000, there’s an extra occurrence of the number 1. In total, the number 1 appears 301 times, and every other number appears 300 times.