Problems based on Numbers Test 5

Question : 27 of 40

Marks: +1, -0

The double of a positive whole number is 50 times the value of its reciprocal. What is the number?

Solution:

Let the positive whole number be x; then

2x = 50 ×1/x

⇒ x^2 = 25 ⇒ x = 5

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