Riddles and Brain Teasers

One Two Six Sequence

What is the next number in this series?

1, 2, 6, 42, 1806, ___

To get the next number, multiply the previous number in the series by itself plus one:n × (n + 1).For example, to get 6, multiply 2 × (2 + 1)
To get 42 multiply 6 × (6 + 1)Thus, 1806 × 1807 = 3263442

To get the next number, multiply the previous number in the series by itself plus one:

n × (n + 1).

For example, to get 6, multiply 2 × (2 + 1)
To get 42 multiply 6 × (6 + 1)

Thus, 1806 × 1807 = 3263442

Posted in Brain Teasers

Tagged with sequence

Hilda’s Age

When Randolph asked Hilda how old she was, Hilda replied that in two years she would be twice as old as she was five years ago. How old is Hilda?

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Aside from the potential response that it’s rude to ask the age of a lady, the answer can be worked out mathematically.x + 2 = 2(x – 5)
x + 2 = 2x – 10
x + 12 = 2x
12 = x
In two years she’ll be 14, which is twice her age 5 years ago (7).

Aside from the potential response that it’s rude to ask the age of a lady, the answer can be worked out mathematically.

x + 2 = 2(x – 5)
x + 2 = 2x – 10
x + 12 = 2x
12 = x
In two years she’ll be 14, which is twice her age 5 years ago (7).

Posted in Brain Teasers

White, Round Not Always Around

I’m white, I’m round, but not always around. Sometimes you see me, sometimes you don’t. What am I?

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The moon.

Posted in Riddles

Touch Me and I’m Gone

Touch me and I’m gone,
But to you I belong.
I stay with you for life,
But I am not seen by your wife.

What am I?

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Your reflection in the water.

Posted in Riddles

I Have An Eye But Cannot See

I have an eye but cannot see.
I’m faster than any man alive and have no limbs.

What am I?

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A tornado or a hurricane. The calm area in the middle of such a storm is called the eye and wind speeds can reach up to 300 mph in an extreme tornado. Neither one have any arms or legs, but that doesn’t stop them from moving, does it?

Posted in Riddles