question_answer 1)

Solve the following riddle: I am a number, Tell my identity! Take me seven times over And add a fifty! To reach a triple century You still need forty!                

Answer:

                Let \['x'\] be the number, then according to the question, we get \[(x\times 7)+50=300-40\] \[7x+50=260\] \[7x=210\] \[x=\frac{210}{7}=30\] So, the number is 30.