Approximation Test-5 (Approximation of decimal figures)

Answer: Option C

Explanation

Given,

$\sqrt{624.98}+\sqrt{729.25}=?$

It can also be approximated as

$\sqrt{625}+\sqrt{729}=?$

= 25+27

= 52

Hence, Option C is correct.

Answer: Option A

Explanation

Given,

69.008% of 699.998+32.99% or 399.999 =?

It can also be approximated as

70% of 700+33% 400=?

= 70×7+33×4

= 490+132

= 622 ≈ 615

Hence, Option A is correct.

Answer: Option A

Explanation

Given,

171.995×14.995÷25=?

It can also be approximated as,

172×15÷25=?

= 172×$\frac{15}{25}$

= 7×15 =105

Hence, Option A is correct.

Answer: Option E

Explanation

Given,

380×12.25-365÷15=?

It can aslo be approximated as

380×12.25-365÷15=?

= 4655-24.33

= 4631 ≈ 4650

Hence, Option E is correct.

Answer: Option C

Explanation

Given,

(25.01)²-(15.99)²=?

It can also be approximated as

(25)²-(16)²=?

= 625-256

= 369

Hence, Option C is correct.