It is arithmetic but what topic?

[Jorgeesteban]

How to solve this? How to search in google?

1- Si a + b + c = 19, hallar $\displaystyle \overline{abc}\, +\, \overline{cab}\, +\, \overline{bca}$

2- Calcular a, b, c, si se sabe que a + b + c = 14, además $\displaystyle \overline{ab}\, +\, \overline{ca}\, =\, 125$

3- Hallar el valor de x en 1 + 3 + 5 + ... + x = 9801

 

[stapel]

1- Si a + b + c = 19, hallar $\displaystyle \overline{abc}\, +\, \overline{cab}\, +\, \overline{bca}$

2- Calcular a, b, c, si se sabe que a + b + c = 14, además $\displaystyle \overline{ab}\, +\, \overline{ca}\, =\, 125$

3- Hallar el valor de x en 1 + 3 + 5 + ... + x = 9801

I think the questions are as follows:

1. If a + b + c = 19, find the value of $\displaystyle \overline{abc}\, +\, \overline{cab}\, +\, \overline{bca}.$

2. Calculate the values of a, b, and c, if it is know that a + b + c = 14 and that $\displaystyle \overline{ab}\, +\, \overline{ca}\, =\, 125.$

3. Calculate the value of x in 1 + 3 + 5 + ... + x = 9801.