What approximate value should come in place of the question mark (?) in the following question? 289.89% of 399.88 + (√441 + √361) – 1 = ?

What approximate value should come in place of the question mark (?) in the following question? 289.89% of 399.88 + (√441 + √361) – 1 = ? Correct Answer 1199

Rules of Approximation:

1. If a number has digits to the right of the decimal less than 5, then just drop the digits to the right of the decimal. The number so obtained will be the approximated value.

2. If a number has digits to the right of the decimal more than 5, then just drop the digits to the right of the decimal and raise the remaining number by '1'.The number so obtained will be the approximated value.

Concept:

In this type of question, we are expected to calculate approximate value (not exact value), so we can replace the given numbers by their nearest perfect places which makes the calculation easy.

289.89 % of 399.88 + (√441 + √361) – 1 = ?

taking approximate value, we get

290 % of 400 + (√441 + √361) – 1 = ?

Follow BODMAS rule to solve this question, as per the order given below, 

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⇒ (290 ÷ 100) × 400 + (21 + 19) – 1 = ?

⇒ 1160 + 40 – 1 = ?

⇒ 1200 – 1 = ?

⇒ ? = 1199

∴ The value of ? is 1199