1) The unit digit in the product (624 * 708 * 913 * 463) is: a. 2 b. 5 c. 6 d. 8 2) The ratio of two numbers is 4 : 5 and their H.C.F is 4. Find their L.C.M. a. 96 b. 80 c. 73 d. 48 3) 3639 + 11.95 - x = 3054. Find the value of x. a. 407.09 b. 479.75 c. 523.93 d. 596.95 4) If 2x +3y = 30 and (x+y)/y = 11/8, then find the value of 5y + 6x a. 72 b. 58 c. 64 d. 29 5. The averag...