#211 - Maths Odd One Out Puzzle
Which Number is odd one out ?
A) 7145
B) 2716
C) 5321
D) 4135
2716
Sum of digits in not prime in 2716
#212 - Funny Logical Maths Puzzle
If
1 = 5 ,
2 = 25 ,
3 = 325 ,
4 = 4325
Then 5 = ?
1
Already stated 1=5 =>5=1
#213 - Tough Age Puzzle
My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?
I am 72 years old.
Let m be my age in years. If s is my son's age in years, then my son is 52s weeks old. If g is my grandson's age in years, then my grandson is 365g days old. Thus,
365g = 52s.
Since my grandson is 12g months old,
12g = m.
Since my grandson, my son and I together are 120 years,
g + s + m = 120.
The above system of 3 equations in 3 unknowns (g, s and m) can be solved as follows.
m / 12 + 365 m / (52 x 12) + m = 120 or
52 m + 365 m + 624 m = 624 x 120 or
m = 624 x 120 / 1041 = 72.
So, I am 72 years old.
#214 - Dollar Cent Maths Riddle
I went to the book shop and spent one half of the money that was in my purse.
When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.
I have Dollar 99.98 in my purse when I entered the store.
#215 - Tricky Algebra Sum Riddle
Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.
What is the total?
4100
some people might guess 5000
#216 - Maths Equation Puzzle
I know a way by which i can make i can get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?
(0!+0!+0!+0!+0!)!
=(1+1+1+1+1)!
=(4)!
=5! is 5*4*3*2*1=120
#217 - Guess The Number Puzzle
I know a 5 digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.
Guess the number ?
42857
Let the number be x
10x +1 = 3(100,000 + x)
=> x = 42857.
#218 - Logic Math Problem
In Sahara desert , 3 men found a big 24L Jar is full of water. Since there is shortage of water so they decided to distribute the water among themselves such that they all have equal amounts of it. But they only have a 13L, a 5L and an 11 liter Jar.
How do they do it?
24 13 11 5
----------
24 0 0 0
11 13 0 0
6 13 0 5
6 2 11 5
8 0 11 5
8 5 11 0
8 13 3 0
8 8 3 5
8 8 8 0
#219 - Maths Aptitude Puzzle
A octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind ?
There are 5 octopus, 7 hippogriff & 6 sphinx.
Let 'A' be the number of octopus, 'B' be number of hippogriff and 'C' be number of sphinx.
A+B+C = 18
8A+6B+6C = 118
2B+C = 20
Solving this, A=5, B=7, C=6
#220 - Maths Algebra Puzzle
Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.
* *
x *
=====
* * *
54
x3
===
162