Quantitative Aptitude - Arithmetic Ability Questions

In what ratio must a mixture of 11% sugar strength be mixed with that of 25% sugar strength so as to get a new mixture of 13% sugar strength?

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

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

The number of diagonals in a hendecagon is

Δ ABC is right angled at B. If m∠A = 60°, then what is the value of 2 Sec C x 1/2 Sin A?

Of the 3 numbers whose average is 64, the first number is 1/3 times the sum of other 2. The first number is

If x - √x = 20; Find the value of √x.

Dodecahedron has 30 edges. How many vertices does it have?