What is the mass percent of carbon in Limestone?
(a)12
(b) 24
(c) 6
(d) 18

What is the mass percent of carbon in carbon dioxide ?

If the difference of mode and median of a data is 24, then the difference of median and mean is (a) 12 (b) 24 (c) 8 (d) 36

In a class there are 18 boys who are over 160 cm tall. If these boys constitute three-fourths of the boys and the total number of boys is two-thirds of the number of students in the class, then what is the number of girls in the class? (a) 6 (b) 12 (c) 18 (d) 24

The mean proportional of 6 and 24 is (a)15 (b) 12 (c)8 (d) 144

In limestone,40% is calcium and the rest is carbon and oxygen.If in 20kg of limestone, there is 9.4kg of oxygen,ten what is the percentage of carbon in it? 12% b.13% c.14% d.15%

A man walked diagonally across a square lot. Approximately, what was the percent saved by not walking along the edges? (a) 20 (b) 24 (c) 30 (d) 33

The number of students appeared for the scholarship exam from School D is approximately what percent of the total number of students appeared for the exam from all the schools together? (a) 12 (b) 24 (c) 29 (d) 18( e) 8

Find the highest common factor of 36 and 84 . (a) 4 (b) 6 (c) 12 (d) 18