2

Part of 2014 Junior Regional Olympiad - FBH

Problems(3)

Junior Regional Olympiad - FBH 2014 Grade 6 Problem 2

Source:

In one class in the school, number of abscent students is

\frac{1}{6}

of number of students who were present. When teacher sent one student to bring chalk, number of abscent students was

\frac{1}{5}

of number of students who were present. How many students are in that class?

Junior Regional Olympiad - FBH 2014 Grade 7 Problem 2

Source:

We know that raw wheat has

70\%

moisture and dry wheat has

10\%

moisture. One miller bought

3

tons of raw wheat with price of

0.4 \$

per kilo. At which price miller has to sell dry wheat, so he gets

80\%

Junior Regional Olympiad - FBH 2014 Grade 8 Problem 2

Source:

\frac{1}{1+x+xy}+\frac{1}{1+y+yz}+\frac{1}{1+z+zx}

x

y

z

are real numbers usch that

xyz=1