Prime Number

Q: Determine the value(maximum) of an 11 digit prime number P (base ten, no leading zeros) such that N contains each of the digits from zero to nine at least once .

Three lines and a W

Q: Through the W given below, draw 3 lines. By doing this, count the maximum number of triangles you can form which are not overlapping.

Solution: 9

Related Words

Q: What four related words are merged here:

SSAW MIUT PUIU NEEM RTMN RGRN

[HINT: Each group has one letter for each word.]

Solution: SPRING SUMMER WINTER AUTUMN

I know this was tough... but gear up...

For these kind of questions try to analyze the first group and relate it to related terms around you...

Sequence

Q: Find the next number in the following sequence

31,28,31,30,31,?

3,3,5,4,4,?

Solution: 31, 28, 31, 30, 31, 30

The sequence is number of days in each month starting from January

3,3,5,4,4,3

Its the number of letters in words representing numbers starting from one.

Weight

Q: Which is heavier, One pound of cotton or One pound of gold?

Solution: The weight of one pound cotton is more than one pound gold.

Cotton is measured in 16oz pound(Avoirdupois pound). But Gold is measured in 12oz pound(Troy pound).

For more information visit http://en.wikipedia.org/wiki/Pound_(mass)

Equator!!

Q: The circumference of the Earth is approximately 40,000 km. If we take a wire that is only 10 meters (0.01 km) longer than the circumference of the globe and circle it around the globe, can a flea, a mouse, or even a man can creep under it?

Solution

Circumference = 2*PI*r

Radius of Earth, rE = 40000/2*PI = 6366.1977236758134307553505349006

Radius of Wire, rW = 40000.01/2*PI = 6366.1993152252443497087082237382

Difference is 0.0015915494309189533576888382082065 = approx 1.6 m

So a tall man must duck to go through it but a smaller man can easily go through.

---===****===----

Corner to Learn@:

Actual Circumference of the Earth is:

At the equator: 24901 miles
Around the poles: 24859 miles
[This is because the spinning of the earth creates a bulge.]

Welcome to Puzzle A Day

Puzzle A Day will be updated with 1 puzzle everyday and the solution to the previous days puzzle.
Look for the previous post for example.

--==IT HELPS IMPROVE YOUR IQ==---

Puzzle A Day will include all kinds of puzzles including Computer Programming. Difficulty level is from the average of 5-6 people around me everyday.

Go puzzling anywhere, @twitter http://twitter.com/onepuzzleaday. Questions will be posted on twitter and you can solve them and come here for comparing your solutions.

Please post your answers. So that we can learn different ways of solving the same.

Thanks for your support and interest.

8x8 Grid

Q: A 2x2 grid can be achieved by drawing three squares on a sheet. How many squares (in minimum) are needed to get a 8x8 grid?


Solution: 15

How? [(0,0) (8,8)][(0,0) (7,7)][(0,0) (6,6)][(0,0) (5,5)][(0,0) (4,4)][(0,0) (3,3)][(0,0) (2,2)][(0,0) (1,1)][(1,1) (8,8)][(2,2) (8,8)][(3,3) (8,8)][(4,4) (8,8)][(5,5) (8,8)][(6,6) (8,8)][(7,7) (8,8)]