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Type 2 : To Find the Approximate Value
Directions (Q. Nos. 16 to 30) What Approximate value should come in place of the question mark(?) in the following questions? (You are not expected to calculate the exact value)
- 16. √197 + √365 = ?
A.35
B.33
C.37
D.31
Answer & Explanation
Answer: Option B 
√197 + √365 = ?
√365 ≈ 19
√197 + √365 ≈ (14 + 19) ≈ 33
View Answer
- 17. √4890 = ?
A.70
B.75
C.78
D.73
Answer & Explanation
Answer: Option A
√4890 ≈ 69.9 ≈ 70
View Answer
- 18. 3√941190 = ?
A.98
B.86
C.96
D.92
Answer & Explanation
Answer: Option A
3√941190 ≈ 3√(98 × 98 × 98) ≈ 98
View Answer
- 19. √675.001 + (4.005)3 = ?
A.84
B.86
C.90
D.94
Answer & Explanation
Answer: Option C
? = √(26 × 26) + (4)3
= 26 + 64 = 90
View Answer
- 20. √727.99950 + (5.1961)2 = ? ÷ 2/10.7960
A.53
B.45
C.15
D.10
Answer & Explanation
Answer: Option D
√727.9995 + (5.1961)2 = ? ÷ 2/10.7960
=> (? × 10.8)/2 ≈ √728 + (5.2)2
=> ? × 5.4 ≈ 27 + 27.04
= 54.04
=> ? ≈ 54.04/5.4 ≈ 54/5.4 ≈ 10
View Answer
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