problems

2. In a triangle, the smallest angle is 20o less than the middle angle, and the largest angle is twice the middle one. Find all the angles.

 

 

Exercise: solve the following problems:

 

1.- If we add a number and its consecutive number, we obtain 53. Calculate both numbers.

 

2.- A notebook costs 1 € more than a pen. If I paid 5 € for 3 pens and 2 notebooks, how much does a pen cost ? And a notebook?

3.- Roberta is one year younger than her sister Marta, and she was 5 years old when her brother Antonio, the youngest one, was born. Which is the age of the three of them, knowing that the sum of their current ages is 35 years?

 

 

 

 

 

 

Solutions: 1) 26 and 27; 2) pen 0,60 €, notebook 1,60 €; 3) Roberta 13 , Marta 14 and Antonio 8 years old