# Approximation for Bank PO and Clerk 2021 Exams at Smartkeeda

Direction: What approximate value should come in the place of question mark (?) in the following questions?
Important for :
1
3739 + 164 × 27 = ?
» Explain it
C
? = 3739 + 164 × 27

= 3739 + 4428 ≈ 8200

Hence, option C is correct.

2
(8.97)2 × (15.05)2 ÷ √624.89 = 9?
» Explain it
A

(8.97)2 × (15.05)2 ÷√(624.89) = 9?

⇒  9?  ≈  (9)2 × (15)2 ÷ √625

⇒ 9? ≈ 81 × 225 ÷ √1252

⇒ 9? ≈ {(81 × 225) / 25}

⇒  9?  ≈  93

∴   ?  =  3

Hence, option A is correct.

3
18.23 × 23.04 ÷ ? + 252 = 329.07
» Explain it
D
18.23 × 23.04 ÷ ? + 252 = 329.07

= {(18 × 23) / ?} + 252 = 329

≈ or, {(18 × 23) / ?} = 77

≈ or {(18 × 23) / 77} = ? ⇒  ? = 5.33 ≈ 5

Hence, option D is correct.

4
124% of 624.809 + 11.75% of 1279.43 = ?
» Explain it
A
124% of 624.809 + 11.75% of 1279.43 = ?

? ≈ 125% of 625 + 12% of 1280

? ≈ (100% of 625 + 20% of 625 + 4% of 625) + (10% of 1280 + 2% of 1280)

? ≈ (625 + 125 + 25) + (128 + 25.6)

? ≈ 775 + 153.6 = 928.6 ≈ 925.

Hence, option A is correct.

5
?2 + 34.68% of 1495.89 + 279 = 3420.679
» Explain it
B
?2 + 34.68% of 1495.89 + 279 = 3420.679

⇒ ?2 ≈ 3421 – (35% of 1496 + 279)

⇒ ?2 ≈ 3421 – (30% of 1496 + 5% of 1496 + 279)

⇒ ?2 ≈ 3421 – (448.8 + 74.8 + 279)

⇒ ?2 ≈ 3421 – (802.6)

⇒ ?2 ≈ 2618 ⇒ ?2 ≈ (52)2

⇒ ? = 52

Hence, option B is correct.

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