# Grade - examples - page 210

- Mysterious number

The magician thinks the number: "The mysterious number is first divided by minus five, dividing the result by three, multiplying the number by ten, and dividing the resulting number by minus four. This gives result 5. Can you reveal the mysterious number? - The tub

If we drop the 5 l from the first tap and the from second 2 liters of water, the water in the tub will have a temperature of 25°C. If we drop 3 l from the first tap and from second 4 l of water, the water in the tub will have a temperature of 21°C. Determi - Birthday party

For her youngest son's birthday party, mother bought 6 3/4 kg of hotdog and 5 1/3 dozens bread rolls. Hotdogs cost 160 per kilogram and a dozen bread roll costs 25. How much did she spend in all? - If you

If you travel to work 22 days and it takes 29.2 minutes, how many minutes will it take to travel to work and back? - Regrouping

Subtract mixed number with regrouping: 11 17/20- 6 19/20 - Scalar product

Calculate the scalar product of two vectors: (2.5) (-1, -4) - Unknown number

I think the number. I'll reduce it to its one-third. The result is then increased by one-third, and I get the number 12. - Difference in temperatures

The temperature in the number line show minus 15 degree celsius and 8 degree celsius. What is the different between the temperatures? - Intersections

Find the intersections of the function plot with coordinate axes: f (x): y = x + 3/5 - Water 31

Richard takes 3 1/6 liters of water before noon and 2 3/5 liters of water after noon. How many litres of water does Richard consume a day ? - Intercept with axis

F(x)=log(x+4)-2, what is the x intercept - Expression

Solve for a specified variable: P=a+4b+3c, for a - GP members

The geometric sequence has 10 members. The last two members are 2 and -1. Which member is -1/16? - Twenty

Twenty rabbits are put in 4 cells so that there are different number of rabbits in each cell contains at least 3 rabbits. What is the largest possible number of rabbits in one cell - To improper fraction

Change mixed number to improper fraction a) 1 2/15 b) -2 15/17 - Two equations

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

The length of a rectangle of x units is increased by 10% and its width of y units is increased by 15%. What is the ratio of the area of the old rectangle to the area if the new rectangle? - Melting point

The melting point of mercury is -36°F and its boiling point is 672°F. What is the difference between the boiling point and the melting point? - Collision

The two bodies, whose initial distance is 240 m, move evenly against each other consistently. The first body has an initial velocity of 4 m/s and an acceleration of 3 m/s^{2}, the second body has an initial speed of 6 m/s and an acceleration of 2 m/s^{2}. Find - Factors 2

A number has 3 identical factors. If 1 of them is 18. Find the number step by step

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