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Approximation Questions PDF for LIC AAO 2021, CET, SBI PO, IBPS PO, RRB Scale I Pre

Direction: What approximate value should come in place of question mark ?
1
{(7 / 8) of 5432.33} – 5 + {(9 / 10) of  6929.92} – 5 = ?
» Explain it
A
{(7 / 8) of 5432.33} – 5 + {(9 / 10) of  6929.92} – 5 = ?

or {(7 × 5432) / 8} –5 + {(9 ×6930) /10} – 5 = ?

or 7 × 679 – 5 + 9 × 693 – 5 = ?

or 4753 + 6237 – 10 = ?

?  = 4753 + 6227

?  = 10980

Hence, option A is correct.

2
(1014.03 / 12.989) – 8.99 × 6.89 = ? – (503.98 / 8.99) + 19.93
» Explain it
C
(1014.03 / 12.989) – 8.99 × 6.89 = ? – (503.98 / 8.99) + 19.93

≈ (1014 / 13) – 9 × 7 = ? – (504 / 9) + 20

⇒ 78 – 63 = ? – 56 + 20

⇒ 15 = ? – 36

⇒ ? = 15 + 36 = 51

Hence, option C is correct.

3
(? / 47.99) = (344.003 / 42.98) × (66.99 / 1072.003)
» Explain it
B
?  =  344.003  ×  66.99 47.99 42.98 1072.003

≈ (? / 48) = (344 / 43) × (67 / 1072)

⇒ ? = 48 {8 × (1 / 16)}

⇒ ? = 24

Hence, option B is correct.

4
{(? + 12.013) / 2.99} = ∛6860 × √1520
» Explain it
D
{(? + 12.013) / 2.99} = ∛6860 × √1520

≈ {(? + 12.013) / 2.99} = ∛6860 × √1520

⇒ ? + 123 = 3 [19 × 39]

⇒ ? = 3 × 741 – 1728

⇒ ? = 2223 – 1728 = 495

Hence, option D is correct.

5
? = (1824.01 ÷ 18.89) ÷ [16.98 ÷ 25.03] × (594.99 ÷ 23.99)
» Explain it
A
? = (1824.01 ÷ 18.89) ÷ [16.98 ÷ 25.03] × (594.99 ÷ 23.99)

⇒ ? ≈ (1824 ÷ 19) ÷ [17 ÷ 25] × (595 ÷ 24)

⇒ ? = (1824 / 19) ÷ (17 / 25) × (595 / 24)

⇒ ? = (1824 / 19) × (25 / 17) × (595 / 24)

⇒ ? = 96 × 25 × (35 / 24)

⇒ ? = 4 × 25 × 35

⇒ ? = 3500

Hence, option A is correct.