What approximate value will come in place of question mark (?) in the following questions? (You are not expected to calculate the exact value)
(4.12²× 11.99) + ? = 45.22% of 5000

​$$\sqrt{201\frac{49}{100000}+49\frac{1}{10000}-\frac{5}{1000}+6\frac{45}{10000}}=x$$​
Find the approximate value of $$x^2$$​ ?

If 88% of 1110 + 24% of 630 - 3x = 282, then x is equal to:

The difference between the simple and the compound interest on a certain sum of money for 3 years at 10% p.a is Rs. 77.50. Find the sum.

Rishi can finish $$\frac{1}{4}^{th}$$​ of a certain work in 26 days. Rakesh can finish $$\frac{9}{20}^{th}$$​ of the same work in 18 days. Rustum can finish 2/3 of the same work in 48 days. Who will complete the work first?

A rainy day occurs once in every 5 days. One-quarter of the rainy days produce rainbows. The percentage of days having no rainbows is:

The selling price of an article is ₹ 150 . Find the profit percentage, if the cost price of the article is 82.5% of the selling price.

Find the HCF of 2.8, 11.2 and 0.84 .

The ratio of the length of each equal side and the third side of an isosceles triangle is 5:6. If the area of the triangle is √11664 sq.cm., then the length of the third side (in cm ) is:

What is the rate percent and time needed, both of them being equal in value, for the simple interest on a certain sum to be 36 over 100 of that sum?

What is the value of ' x ' in the following equation?
​$$11^2+1.1^2+0.11^2+0.011^2=x$$​​