Question

a number is divided into two parts one part being 4 times the other. the difference between the two parts is 15.what is number

Answer 1

Let two parts be x and y respectively

we are given, x = 4y ...................................(1)

also given, x-y = 15

By Eqn (1)  4y-y = 15 
                    3y = 15
                      y = 5 ..............................(2)

so, Number = x+y
                     = 4y + y                           [By Eqn . (1)]
                     = 5y 
                     = 5(5)
                     = 25                                 [By Eqn (2)]

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Answer 2

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