# Examples for secondary school students

#### Number of problems found: 2186

- Two equations

Solve equations (use adding and subtracting of linear equations): -4x+11y=5 6x-11y=-5 - Combinations

How many elements can form six times more combinations fourth class than combination of the second class? - Q of GP

Calculate quotient of geometric progression if a1=5 a a1+a2=12. - Probabilities

If probabilities of A, B and A ∩ B are P (A) = 0.62 P (B) = 0.78 and P (A ∩ B) = 0.26 calculate the following probability (of union. intersect and opposite and its combinations): - Quadrant

In what quadrant is a -1165° angle? - 2nd class combinations

From how many elements you can create 4560 combinations of the second class? - Metals

In the Hockey World Cup play eight teams, determine how many ways can they win gold, silver and bronze medals. - Decelleration

In a braking test, a vehicle that travels at 51 km/h stops in 5 s. What is the acceleration? - Borrowing

I borrow 25,000 to 6.9% p.a.. I pay 500 per month. How much will I pay and for how long? - AP 6

Calculate the first five items of an arithmetic sequence if it is given: a_{2}– a_{3}+ a_{5}= 20 a_{1}+ a_{6}= 38 - Chess

How many different ways can initiate a game of chess (first pass)? - AVG of INT

What is the average of the integers from 9 throuht 52 inclusive? - Insert 6

Insert four harmonic means between 3/7 and 3/19 - Cancel fractions

Compress the expression of factorial: (n+6)!/(n+4)!-n!/(n-2)! - Exponential equation

Solve for x: (4^x):0,5=2/64. - Linsys2

Solve two equations with two unknowns: 400x+120y=147.2 350x+200y=144 - The dice

What is the probability of events that if we throw a dice is rolled less than 6? - Product

The product of two consecutive odd numbers is 8463. What are this numbers? - Election 4

In a certain election there are 3 candidates for president 5 for secretory and 2 for tresurer. Find how many ways the election may (turn out/held). - Tokens

In the non-transparent bags are red, white, yellow, blue tokens. We 3times pull one tokens and again returned it, write down all possibilities.

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