# Decimal Numbers Quiz Set 010

### Question 1

What is 0.0088 × 0.38?

A

\$3.344 × 10^{-3}\$.

B

\$3.344 × 10^{-2}\$.

C

\$3.344 × 10^{-1}\$.

D

\$3.344 × 10^{-4}\$.

Soln.
Ans: a

### Question 2

What is \${0.70 × 0.70 × 0.70 + 0.03 × 0.03 × 0.03}/{3.50 × 3.50 × 3.50 + 0.15 × 0.15 × 0.15}\$?

A

\$1/5^3\$.

B

\$1/7^3\$.

C

\$1/5^2\$.

D

\$1/7^2\$.

Soln.
Ans: a

By inspection, the given ratio is same as \${0.70 × 0.70 × 0.70 + 0.03 × 0.03 × 0.03}/{5^3 × ({0.70 × 0.70 × 0.70 + 0.03 × 0.03 × 0.03})}\$ which is \$1/5^3\$.

### Question 3

What is y in \$9.69 + 0.1 + y = 0.09\$?

A

-9.7.

B

+9.7.

C

-7.9.

D

+7.9.

Soln.
Ans: a

y = 0.09 - (0.1 + 9.69) = -9.7.

### Question 4

What is x in \${437/0.0437} = {4.37/x}\$?

A

\$4.37 × 10^{-4}\$.

B

\$4.37 × 10^{-3}\$.

C

\$4.37 × 10^{-2}\$.

D

\$4.37 × 10^{-5}\$.

Soln.
Ans: a
Transposing, x = \$4.37 × {0.0437/437}\$ which gives 0.000437, which, in scientific form is \$4.37 × 10^{-4}\$.

### Question 5

What is x in \${846/0.0846} = {8.46/x}\$?

A

\$8.46 × 10^{-4}\$.

B

\$8.46 × 10^{-3}\$.

C

\$8.46 × 10^{-2}\$.

D

\$8.46 × 10^{-5}\$.

Soln.
Ans: a
Transposing, x = \$8.46 × {0.0846/846}\$ which gives 0.000846, which, in scientific form is \$8.46 × 10^{-4}\$.

This Blog Post/Article "Decimal Numbers Quiz Set 010" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2017-04-07.

Posted by Parveen(Hoven),
Aptitude Trainer