Number of Astronauts who were goint to Mars is 225 so (a+e+g+f) = 225 of which 26(2/3)% Astronauts were going only on mars and moon so f = 26 (2/3)% of 225 = 60 the number of astronauts who were going to both moon and venus are 33(1/3)% greator than those who were going to all the three missions, so d is 33(1/3)% greator than g the number of astronauts who were going to venus but not moon is 185. so c + e = 185 (means venus and mars) 
when x =4 and y =-6 then find the value of 27x³ +58x²y +31xy² +8y³?
If a – b – c = 0, then the value of (a2 + b2 + c2)/(b + ac) is:
If 2x+1, x+2, 2 and 5 are in proportion, then what is the mean proportional between 3.5(1-x) and 8(1+x)?
If a + b + c = 5, a³ + b³ + c³ = 85 and abc =25, then find the value of a² + b² + c² – ab –bc – ca
If x = √7 + √6 and y = √7 - √6 , then the value of is (x2 + y2)/(x3 + y3).
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If 
= 2 then find
If 2x + y = 15 and xy = 18, then the value of (4x² - y²)
