Approximation Test-6 (Approximation of decimal figures)

Answer: Option A

Explanation

Given,

5554.999÷50.0007=?

It can also be approximated as

= 5555÷50=?

= 110

Hence, Option A is correct.

Answer: Option A

Explanation

Given,

(18.001)³=?

It can also be approximated as

= (18)²

= 324×18

= 5832 ≈ 5830

Hence, Option A is correct.

Answer: Option C

Explanation

Given,

23.001×18.999×7.998=?

It can also be approximated as

= 23×19×8=?

= 23×152

= 3496 ≈ 3500

Hence, Option C is correct.

Answer: Option B

Explanation

Given,

22.005% of 449.999=?

It can also be approximated as

22% of 450=?

= $\frac{22}{10}\times 450$

= 22×4.5

= 99 ≈ 100

Hence, option B is correct.

Answer: Option E

Explanation

Given,

$8^{0.601}\times {64}^{17}=?$

It can also be approximated as

$$\begin{gathered} \begin{array}{l}{\text{8}}^{\text{0.601}}\times {\left(\text{8}\right)}^{\text{2x 1.7 }}\text{=?}\end{array} \\ \begin{array}{l}{\text{= 8}}^{0.60}\times {\left(8\right)}^{3.4}\end{array} \\ \begin{array}{l}{\text{= 8}}^{0.6+3.4}[\because a^m\times a^n=a^{m+n}]\end{array} \\ \begin{array}{l}{\text{= (8)}}^{\text{4}}\end{array} \end{gathered}$$

 = 64×64

 = 4096

Hence, option E is correct.