question_answer 1)

Answer the following. (a) Given Munnu's age to be \[x\] years, can you guess what \[(x-2)\]may show? (Hint Think of Munnu's younger brother). Can you guess what \[(x+4)\] may show? What \[(3x+7)\]may show? (b) Given Sara's age today to be y years. Think other age in the future or in the past. What will the following expression indicate? \[y+7,y-3,y+4\frac{1}{2},y-2\frac{1}{2}\] (c) Given n students in the class like football, what may \[2n\] show? What may \[n/2\] show? (Hint Think of games other than football).                

Answer:

                (a) Given, Munnu's age \[=xyr\] Then, \[(x-2)\]may Munnu's younger brother or sister's age. \[(x+4)\] may show Munnu's elder brother or sister's age and \[(3x+7)\] may show the age of Munnu's father or mother. (b) Given, Sara's present age \[=y\,yr\]. Then, \[(y+7)\] shows Sara's age after 7 yr from now, \[(y-3)\]shows Sara's age 3 yr back. \[\left( y+4\frac{1}{2} \right)\] shows Sara's age after \[4\frac{1}{2}yr\] from now, \[\left( y-2\frac{1}{2} \right),\] shows Sara's age\[2\frac{1}{2}yr\] back. (c) Given, number of students like football \[=n\] Now, \[2n\] may show the number of students who like cricket and \[\frac{n}{2}\] may show the number of students who like hockey.