Test Index

Problems based on Numbers Test 3

Question : 19 of 40

Marks: +1, -0

If 16% of 40% of a number is 8, find the number.

Solution:

Concept:

“16% of 40% of a number” means multiplying the number by both percentages.

Explanation:

Let the unknown number be

x

Then,

16\%

40\%

x

8

So,

\frac{16}{100} \times \frac{40}{100} \times x = 8

Simplify:

\frac{640}{10000} \times x = 8

Thus,

\frac{8}{125} \times x = 8

Multiply both sides by

\frac{125}{8}

x = 8 \times \frac{125}{8}

Therefore,

x = 125

Answer:

The number is

125

, so the correct option is C.

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