0
Q:

# Puzzle : Blueberries and Cups

Maria have some blueberries and some cups. If she put 9 blueberries into each cup she will have two cups left. If she put 6 blueberries into each cup she will have three blueberries left over.

Q:

In a certain city, 5% of all the persons in town have unlisted phone numbers. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone numbers?

Zero. You are selecting names from the list, so they are all listed.

Subject: Math Puzzles

76
Q:

Which number multiplied by itself will give the output as 12345678987654321 ?

11 * 11 = 121

111 * 111 = 12321

what we observe is that the square of the number follows a pattern: 2 1's gives 121. 3 1's gives 12321.

so to get 12345678987654321 we need to get square of 9 1's(111,111,111).

Subject: Math Puzzles

267
Q:

What 5 - digit number has the following features :

If we put the numeral 1 at the beginning, we get a number three times smaller than if we put the numeral 1 at the end of the number?

Let the 5 digit number be represented by abcde.

Then the 6 digit number, 1abcde x 3 = abcde1 (another 6 digit number)

Now let Y = abcde

Then (100000 + Y) x 3 = (Y x 10) + 1

300000 + 3Y = 10Y + 1

7Y = 299999

Y = 299999 ÷ 7 = 42857

Subject: Math Puzzles

208
Q:

Arrange four nines(9) and a one(1) and only one mathematical symbol to make it equal to 100 ?

199 - 99  = 100

Subject: Math Puzzles

344
Q:

In a Certain Country $\inline \frac{1}{2}$ of 5 = 3. If the same proportion holds, what is the value of $\inline \frac{1}{3}$ of 10 ?

 A) 4 B) 6 C) 8 D) 10

Explanation:

Let $\inline \frac{1}{3}(10)=x$

$\inline \Rightarrow 3x=10$

Given that $\inline \frac{1}{2}(5)=3$

$\inline \therefore \frac{5}{2}(x)=10$

$\inline \Rightarrow x=4$