Quantitative Aptitude - Arithmetic Ability Questions

If x1/4 + x-1/4 = 2, then what is the value of x81 + (1/x81)?

If a(a + b + c) = 45, b(a + b + c) = 75 and c(a + b + c) = 105, then what is the value of (a2 + b2 + c2 )?

What is the value of (91 + 92 + 93 + ......... +140)?

x and y are two numbers such that their mean proportion is 8 and third proportion is 512. What is the value of x and y?

Find the odd word/letters/number from the given alternatives

Two numbers are 40% and 80% lesser than a third number. By how much percent is the second number to be enhanced to make it equal to the first number?

A solid has 12 vertices and 30 edges. How many faces does it have?

Select the odd word/letters/number/number pair from the given alternatives.