One lily pad, doubling in size every day, covers a pond in 30 days. How long would it take eight lily pads to cover the pond?
137894
A lily pad doubles in area every second. After one minute, it fills the pond. How long would it take to quarter fill the pond ?
53732
Calculate Time Remaining
41534
A system of logarithmic equations with parameters
157413
Area enclosed between the curves $y=x^2$ and $y=60-7x$
132545
How much energy is necessary to set a year to exactly 360 days
81042
How can we draw $14$ squares to obtain an $8 \times 8$ table divided into $64$ unit squares?
11976
Help with a recurrence with even and odd terms
151732
Number of solutions of polynomials in a field
105792
Combinatorics question about Taking Days Off
4301
How many different arrangements?
118938
Number of leaves in a tree (all types of trees)
126689
Find the number of natural solutions of $5^x+7^x+11^x=6^x+8^x+9^x$
102866
If the number $"1"$ is written at the beginning, at least how many steps should be taken to reach $2^{2018}?$
22106
Prove that time for planet to fall into the Sun equals $\left( \frac { 1 }{ 4\sqrt { 2 } } \right)$ of the planet's period
156395
how many terms will there be once you collect terms with equal monomials? What is the sum of all the coefficients?
41205
Help me solve a combinatorial problem
122835
Lengths and when to use them