### Brain Teasers

# Where's the Father?

The mother is 21 years older than the child.

6 years from now, the mother will be 5 times as old as the child.

Question : Where is the father?

6 years from now, the mother will be 5 times as old as the child.

Question : Where is the father?

### Answer

The mum is 21 years older than the child, so...M = C + 21

In 6 years from now the mum will be 5 times as old as the child.

M + 6 = (C + 6) * 5

(C + 21)+ 6 = (C + 6) * 5

C + 27 = 5C + 30

-3 = 4C

C = -3/4

The child is -3/4 years old, i.e. it'll be born in 9 month's time.

So, the father is probably nearby.

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## Comments

That is one awesome teaser! Very very clever, I like your thinking.

Uh?

Reminds me of an old saying "Their eldest child was born nine months and ten minutes after the wedding!"

where is the father ?

asleep with his hands down his pants .

asleep with his hands down his pants .

lol im lost

I'd figured the father was in jail, or on his way there, for statutory rape.

That was strictly from the nature of the question and before I even attempted the math.

The mother could have been artificially inseminated, as opposed to the "traditional" way...

HA!!! That made me chuckle! Good teaser!

I like your euphamism with "probably nearby"

Had I phrased the questions the answer would have been far more graphic than "nearby"

Great teaser though

Had I phrased the questions the answer would have been far more graphic than "nearby"

Great teaser though

TTMH

1

1

The math is wrong

The 3/4 year old child in 6 years:

3/4+6=6.75

6.75*5=33.75

The 21 year older mother in 6 years

21+6.75=27.75

27.75=/=33.75

change the 21 to 27 and it will work

The 3/4 year old child in 6 years:

3/4+6=6.75

6.75*5=33.75

The 21 year older mother in 6 years

21+6.75=27.75

27.75=/=33.75

change the 21 to 27 and it will work

@RaeSyngKane

Actually, your math is incorrect. I made an account just to correct you

Your first mistake is in your first line. The child is not 3/4 years old. The child is NEGATIVE 3/4 years old. So therefore in 6 years the child will be -3/4 + 6 = 5.25 years old.

You then made a further mistake assuming the mother is 21 years old. Read the riddle, she isn't 21 years old, she is 21 years OLDER than the child. So your second equation to get the mothers age in 6 years makes no sense whatsoever.

Using the corrected child's age in 6 years (5.25) you can check that this works out using the reasoning and math below:

Mother's age is 21 plus the child's age, and we now know the child is 5.25 in 6 years, therefore in 6 years the mothers age is: M = 21 + 5.25 = 26.25

You also know in 6 years the mother will be 5 times older than the child so: M = (5.25) * 5

Now plug in what we have above for the mother (M = 26.25) and you get:

26.25 = 5.25 * 5

26.25 = 26.25

It works out ;)

Actually, your math is incorrect. I made an account just to correct you

Your first mistake is in your first line. The child is not 3/4 years old. The child is NEGATIVE 3/4 years old. So therefore in 6 years the child will be -3/4 + 6 = 5.25 years old.

You then made a further mistake assuming the mother is 21 years old. Read the riddle, she isn't 21 years old, she is 21 years OLDER than the child. So your second equation to get the mothers age in 6 years makes no sense whatsoever.

Using the corrected child's age in 6 years (5.25) you can check that this works out using the reasoning and math below:

Mother's age is 21 plus the child's age, and we now know the child is 5.25 in 6 years, therefore in 6 years the mothers age is: M = 21 + 5.25 = 26.25

You also know in 6 years the mother will be 5 times older than the child so: M = (5.25) * 5

Now plug in what we have above for the mother (M = 26.25) and you get:

26.25 = 5.25 * 5

26.25 = 26.25

It works out ;)

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