The smallest number divisible by 7 with seven 7s is trivially 7777777. Then, what is the greatest 77-digit number divisible by 7 which contains seven 7s?

There is a function $f(x,y)=z$, and $2\cdot x<y$; $x, y, z \in N$ such that $f(x=2, y=5)=32$ $f(x=2, y=6)=36$ $f(x=2, y=7)=40$ $f(x=3, y=7)=48$ $f(x=3, y=8)=52$ $f(x=3, y=9)=56$ Question. Can someone reconstruct the explicit form of the function $f(x,y)=z$, $2\cdot x<y$; $x, y, z \in N$?

this is secret numbers that increase regularly, what is the order? If you like numbers, it will be fun. 2^3 * 224299 2^2 * 3^2 * 19 * 3557 2 * 5 * 320647 2 * 599 * 3011 2 * 29 * 64283 2^3 * 7 * 11^3 * 59 2^3 * 7 * 47 * 1877 2^8 * 19 * 1229 2^2 * 1639271 2^3 * 17 * 109 * 569 2^3 * 5^3 * 17 * 503 ...

Each cell in the lower-right 9x9 grid must contain a positive integer or be left blank. Numbers on the outside of the grid indicate the sums of one or more adjacent digits in that row or column, in order. Each sum is separated by at least one blank cell. No number can be repeated in a row or colu...

iq math test 35, 147, ?, 2387 452801, 773924, 102410, 471056, ? 357, 1251, 152, ?, ?, 0 011010, 100010, 100010, 100010, 000010, ?, 100010 120, 10, 3, ?, ? Please explain me i don`t know that

011010, 100010, 100010, 100010, 000010, ?, 100010 53274, 71067, 7776, 14137, ? answer is 2783 explain me . Why 2783 ? 011010, 100010, 100010, 100010, 000010, ?, 100010 i don`t know

4456, 8111, 6243, ? 120, 10, 3, ?, ? i don`t know that what`s answer ? Please explain me

Please find below a word search puzzle. But it's not just any word search...the words you find cannot be too dense. The definition of a word in this puzzle: appears in /usr/share/dict/words:https://gist.github.com/WChargin/8927565 must be at least four letters long appears contiguously in the gr...

There is a road with length l meters. The start of the road has coordinate 0, the end of the road has coordinate l. There are two cars, the first standing at the start of the road and the second standing at the end of the road. They will start driving simultaneously. The first car will drive from...

Show that $$n =E(n*LOG((10*n)/(1+n))+1)$$ for $n> 0$ , $n$ is integer and E integer part(The ENT function on excel).

My prefix is a term for individuals of a certain gender My suffix is a particle with an electron owed My infix is a misnomer for ASCII code And I am a sprawling abode What am I?

All by oneself: thrown out car, rotten feed, and amount of food found outside bird's house (18) The bird was never found again, and no fingerprints could be found on the car or the food. What happened to the bird?