Ten Times Two is 0218

10 × 2 = 0218
20 × 2 = 1421
30 × 2 = 1632
40 × 2 = ?

2840.

This makes the first column the start of the Fibonacci series: 0, 1, 1, 2.
The second column is the even numbers: 2, 4, 6, 8
The third column is counting up by ones: 1, 2, 3, 4
And the last column is the answer in the first row in reverse: 8, 1, 2, 0.

Don’t ask what 50 × 2 equals. I have no idea. :)

Thanks to Jim for helping with the solution.

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Sixteen, Twenty-six, Then What?

Fill in the missing numbers in this number series.

16, 26, ?, 43, 50, ?, 61, 65, ?, 70, 71

The method to create the series is start by adding 10, then decrease the addend by 1 for each new number in the sequence. That gives us:

16 + 10 = 26
26 + 9 = 35
35 + 8 = 43
43 + 7 = 50
50 + 6 = 56
56 + 5 = 61
61 + 4 = 65
65 + 3 = 68
68 + 2 = 70
70 + 1 = 71

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Yellow Rock into a Purple Stream

What happens when you throw a yellow rock into a purple stream?

It makes a splash.

Posted in Riddles

A Woman Without All Her Fingers On One Hand

What do you call a woman who doesn’t have all her fingers on one hand?

Normal. Women (and men for that matter) have half of their fingers on one hand and half of them on the other.

Posted in Riddles

What Has Wheels and Flies?

What has wheels and flies, but is not an aircraft?

A trash truck. I heard this one when I was a kid. Still a classic!

Posted in Riddles

Never Ahead, Ever Behind

Never ahead, ever behind,
Yet flying swiftly past;
For a child I last forever,
For adults I’m gone too fast.

What am I?

Childhood.

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What Goes Up And Down But Doesn’t Move?

What goes up and down but doesn’t move?

A staircase. They go up and down, but you’re the one moving.

Posted in Riddles

Numbers Night Club

A man wants to get into a night club where the bouncers test each person before they can enter. The man waits and watches.
A woman walks up to the bouncers and the bouncers say 6. The woman replies with 3 and goes in.
A small man walks up and they say 12. The man replies 6 and is admitted.
The first guy thinks he’s figured it out and walks up. They say 4 and the man replies with 2, but they don’t let him in.

What should he have said?

4. The answer is the number of letters in the number. Six has 3 letters, twelve has 6 letters and four has 4 letters.

Posted in Brain Teasers

Leave a Grieving Wife

If you throw me from the window,
I’ll leave a grieving wife.
Bring me back, but in the door and,
You’ll see something giving life.

What am I?

The answer is the letter ‘n’. Taking ‘n’ out of window makes widow. And putting ‘n’ back into door makes donor.

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Fall Crop

What three or four-letter word belongs between the word on the left and the word on the right so that the first and second, and second and third words form a compound word or phrase?

For example: FOOT _ _ _ _ PARK would be BALL, or FOOTBALL and BALL PARK.

1. FALL _ _ _ CROP
2. KNEE _ _ _ SIZE
3. BOARD _ _ _ _ WAY

1. OUT – FALLOUT, OUTCROP
2. CAP – KNEECAP, CAPSIZE
3. WALK – BOARDWALK, WALKWAY

Posted in Brain Teasers