Number Puzzle 4

Posted on 02/06/201702/06/2017 by myrank

1. Which number replaces the question mark?Answer: 10 Explanation: Working in columns, the sum of the numbers in each column equals 23. 2. Which number replaces the question mark? Answer: 7 Explanation: In each square, multiply the top and bottom numbers together to give a 2 digit result, and put the letters with the numerical values Read more about Number Puzzle 4[…]

Formation of differential equations

Posted on 02/06/2017 by myrank

Consider a family of exponential curves (y = Aex), where A is an arbitrary constant for different values of A, we get different members of the family. Differentiating the relation (y = Aex) w.r.t.x, we get dy/dx = Aex Eliminating the arbitrary constant between y = Aex and dy/dx = Aex, we get dy/dx = Read more about Formation of differential equations[…]