Question

1/5 of what number is 5 times of 10?
(A) 250
(B) 100
(C) 200
(D) 405​

Answer 1

Step-by-step explanation:

let the number be X

1/5×X=5×10

1/5×X=50

1×X=50×5

by inverting the question,50×5=1×X

250=1×X

250/1=X

250=X

So, X=250

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Answer 2

The number is 250 [ The correct option (A) 250 ]

Given :

1/5 of a number is 5 times of 10

To find :

The number is

(A) 250

(B) 100

(C) 200

(D) 405

Solution :

Step 1 of 2 :

Form the equation to find the number

Let the number is n

It is given that 1/5 of the number is 5 times of 10

5 times of 10 = 5 × 10 = 50

By the given condition

$\displaystyle \sf \frac{1}{5} \times n = 50$

Step 2 of 2 :

Find the number

$\displaystyle \sf \frac{1}{5} \times n = 50$

$\displaystyle \sf{ \implies }n = 50 \times 5$

$\displaystyle \sf{ \implies }n = 250$

∴ The number is 250

Hence the correct option (A) 250

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