Latest NDA Aptitude Question SOLUTION: Which one among the following is the chemical formula of gypsum which is an ingredient of cement ?
(a) Ca2SiO4 (b) CaSO4.2H2O (c) CaO (d) CaSO4.3H2O
Six is a number perfect in itself, and not because God created the world in six days; rather the contrary is true. God created the world in six days because this number is perfect, and it would remain perfect, even if the work of the six days did not exis
Saint Augustine of Hippo
maths is subject which is fun loving and which checks one ability logically