Three different numbers are selected at random from the set A = (1, 2, 3,...., 10). The probability that the product of two of the numbers is equal to the third is
Find the curve for which the intercept cut off by any tangent on y-axis is proportional to the square of the ordinate of the point of tangency.
Find the mean proportional between 9 and 16
Find an irrational number between 3 and 4.
Find the number of divisors of the number N=2^3 .3^5 .5^7 .7^9 which are perfect squares.
Two dice are thrown. Find the probability that the numbers appeared has the sum 8, if it is known that the second die always exhibits 4.
Find the mean proportional between 48 and 12.
Find the rational numbers between (3)/(5) and ( 7)/( 8) .
Find the median of the observations 13, 9, 15, 8, 6, 3.
