Approximation Test-1 (Rounding off to Integers)

Answer: Option D

Explanation

Given,

18% of 609+27.5% of 450=?

It can be approximated as

= 20% of 600+28% of 450=?

$\text{=}\frac{20}{100}\times 600+\frac{28}{100}\times 450= ?$

= 120+126

= 246 ≈ 248

Hence, Option D is correct.

Answer: Option C

Explanation

Given

$\text{5986}÷\text{364}\times \sqrt{\text{220}}=?$

It can be approximated as

$\text{6000}÷400\times \sqrt{\text{225}}=?$

= 15×15

= 225 ≈ 230

Hence, Option C is correct.

Answer: Option D

Explanation

Given,

21+63÷17=?

It can be approximated as

= 20+64÷16=?

By following order of BODMASS

= 20+4

= 24 ≈ 25

Hence, Option D is correct.

Answer: Option B

Explanation

Given,

1562÷24% of 356 =?

It can be appproximated as

1562÷24% of 400 =?

By applying the BODMAS rule, we get

$= 1562÷\frac{24}{100}\times 400$

= 1600÷96

= 1600÷100

= 16 ≈ 18

Hence, Option B is correct.

Answer: Option A

Explanation

Given,

369% of 695= 10% of ?

It can be aprroximated as

400% of 700=10% of ?

$= \frac{40}{100}\times 700=\frac{10}{100}\times x$ [Put ?=x]

x = 2800

Hence, Option A is correct.