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SiO₂ percentage in firebrick is about
Firebrick is an important raw material of refractory metals, which is made from ______
Acid brick is the material made from fireclay with a silica content about 10% greater than ordinary firebrick.
A student appeared in the Mock CAT. The test paper contained 3 sections namely QA, DI and VA. The percentage marks in all VA was equal to the average of percentage marks in all the 3 sections. Coincidentally, if we reverse the digit of the percentage marks of QA we get the percentage marks of DI. The percentage marks in VA scored by student could be:
The table gives the pass percentage of class X students of five government schools in Delhi on the basis of gender. School Pass Percentage Ratio of boys and girls A 35 5 ∶ 6 B 32 3 ∶ 5 C 24 1 ∶ 2 D 19 3 ∶ 2 E 15 5 ∶ 3 What is the ratio of the pass percentage of boys of school B to the pass percentage of boys of school C?
The following question contains a statement followed by Quantity 1, 2 and 3. You should use the given data and your knowledge of Mathematics to choose among the possible answer.  The options represent the relations between these three quantities  A) >  B) <  C) = D) ≤  E) ≥  1) A, B  2) B, C  3) B, A  4) E, B  5) B, D  Quantity 1: Find the profit percentage on selling a Ray ban sunglass after offering a discount of 20%, if it costs Rs. 1250 and marked up by Rs. 400. Quantity 2: The profit earned by selling an article for Rs. 210 is 20% while the discount percentage allowed on the article is at the rate of 30% then find the percentage by which marked price of the article is raised above cost price?  Quantity 3: What is the profit percentage earned by selling an article which costs Rs. 180 and the shopkeeper sold the article for Rs. 320?
Which of the following is the expression for determination of calorific value of coal using Davies formulae? (where CV is calorific value, %H is percentage of hydrogen, %C is percentage of carbon, %O is percentage of oxygen and %S is percentage of sulphur.) b) CV = (6.543×%H + 403) c) CV = (6.543×%H – 403) d) CV = (6.543×%H – 403)
An article is sold at a loss. If the selling price of the article is tripled, the profit percentage becomes twice the initial loss percentage. Find the initial loss percentage?
Study the histogram and answer the question given below. The given graph represents the percentage of marks scored by students in class X Board Examination in 2018 in a school. Total number of students = 250 The difference between the percentage of students who scored less than 70% marks and the percentage of students who scored 80% and above is:
Which one of the following statements regarding the percentage decadal change in population 2001-2011 is correct? a. In Maharashtra the urban percentage decadal change was more than double the rural. b. For the country as a whole the urban percentage decadal change was even higher than the corresponding rural.