Two pipes of length 1.5 m and 1.2 m are to be cut into equal pieces without leaving any extra length of pipes. The greatest length of the pipe pieces of same size which can be cut from these two lengths will be
Twenty one times of a positive number is less than its square by 100. The value of the positive number is
The value of
(cosec a - sin a) (sec a-cod a) (tan a + cot a)
If 7 sin2θ+3cos2θ=4, then the value of tan θ is (θ is acute)
If a + b = 1, find the value of a3+b3-ab-(a2-b2)2
Articles are marked at a price which gives a profit of 25%. After allowing a certain discount the profit reduces to 12 1/2%. The discount percent is