# Unknown number

Determine the unknown number, which double of its fourth square is equal the fifth its square.

**Result****Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):**

**Showing 0 comments:**

**Be the first to comment!**

#### To solve this example are needed these knowledge from mathematics:

## Next similar examples:

- Two numbers

We have two numbers. Their sum is 140. One-fifth of the first number is equal to half the second number. Determine those unknown numbers. - Unknown number 17

Milada said, I am thinking of a number such that I evaluate expression x^{1}/3, the value of the expression would be 5. Which number Milada thinking? - Divisible by 5

How many three-digit odd numbers divisible by 5, which are in place ten's number 3? - Shots

Determine the percentage rate of keeper interventions if from 32 shots doesn't caught four shots. - Powers

Express the expression ? as the n-th power of the base 10. - One half

One half of ? is: ? - Holidays - on pool

Children's tickets to the swimming pool stands x € for an adult is € 2 more expensive. There was m children in the swimming pool and adults three times less. How many euros make treasurer for pool entry? - Simple equations

Solve system of equations: 5x+3y=5 5x+7y=25 - Alley

Alley measured a meters. At the beginning and end are planted poplar. How many we must plant poplars to get the distance between the poplars 15 meters? - Waiting room

In the waiting room are people and flies. Together they have 15 heads and 50 legs (fly has 6 legs). How many people and flies are in the waiting room? - Candy

Peter had a sachet of candy. He wanted to share with his friends. If he gave them 30 candies, he would have 62 candies. If he gave them 40 candies, he would miss 8 candies. How many friends did Peter have? - Equations

Solve following system of equations: 6(x+7)+4(y-5)=12 2(x+y)-3(-2x+4y)=-44 - Inequation

Solve the inequation: 5k - (7k - 1)≤ 2/5 . (5-k)-2 - Cancer

Of the 80 people 50 people ill cancer. What percentage of people isn't ill? - Enrollment

The enrollment at a local college increased 4% over last year's enrollment of 8548. Find the increase in enrollment (x_{1}) and the current enrollment (x_{2}). - Gloves

I have a box with two hundred pieces of gloves in total, split into ten parcels of twenty pieces, and I sell three parcels. What percent of the total amount I sold? - The ball

The ball was discounted by 10 percent and then again by 30 percent. How many percent of the original price is now?