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Nagalakshmi

· started a discussion

· 1 Months ago

Doubt (Question: 338483.3 )

How to solve these questions in a fastest way?

Question:

DIRECTIONS: What approximate value will come in place of the question mark (?) in the following questions?

\(\cfrac{2566}{511}\)  ×  \(\cfrac{545}{27.4}\)  ÷ \(\cfrac{1218}{3650}\)  ÷ \(\cfrac{192}{54}\)  -  \(\cfrac{4897}{69.93}\)= ?
Options:
A) 13
B) 9
C) 15
D) 18
E) 36
Solution:
\(\cfrac{2566}{511}\)  ×  \(\cfrac{545}{27.4}\)  ÷ \(\cfrac{1218}{3650}\)  ÷ \(\cfrac{192}{54}\)  -  \(\cfrac{4897}{69.93}\)= ? 

≈ 5 x 19.9 ÷ 0.33 ÷ 3.5 – 70 = ?

5 x 19.9 x 3 x \(\cfrac{2}{7}\) - 70 = ?

85.28 – 70 = ?

? ≈ 15

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