Maths Puzzles Questions with Answers for Competitive Exams

Find the mean of first Five Prime Numbers.

If $$ {x+{1\over 16x}}=1 $$, then $$ {64x^{3}+{1\over 64x^{3}}}$$ will be:

If $$ {(x+{1 \over{x}})^{2}}=3$$, the value of of $$  {x^{206}+x^{200}+x^{90}+x^{84}+x^{18}+x^{12}+x^{6}+1}$$

Find the value of ∠BAC in the given diagram If AB=AC=CD and ∠ADB=20°?

Δ ABC is a right angled triangle whose angle A is right angled. Which side needs to bisect to form two other right angled triangles?