Q21. Let x, y, z be three positive integers satisfying y = 3x, z = 4x, x + y + z = 3k, k is an integer. Which of the following is the smallest value of k for which x, y, z are even number?
N = aebfcg is a six- digit number where a, b, c, e, f, g are six digit; If a = e, b = f and c = = g then which of the given informations is not correct?
Q23. A mother purchase three shirts of the same color but of different size for her three sons. All the three shirts were kept in a box in a dark room. The three boys took one shirt each at random from the box. What is the probability that none of the boys this own shirt?
Q24. Product of three consecutive numbers is 2730. What is the sum of three numbers?
Q. Sum of the ages of a boy and his father is 70 years. Before 20 years Father's age was 14 times the age of the boy. What was the age of father at the time of birth of the child?
Q What will be the probability that k1*k2*k3 is an even number, if k1, k2, k3 are 3 positive integers taken randomly.
Q27. What is the sum of all the four digit numbers formed using the digits 0, 1, 2 and 3. None of the two digits should be repeated.?.
Q. There are 5 lines in a plane. Difference between maximum and minimum number of intersecting points. No two lines are parallel
Q29. How many words can be formed by using all the letters of the word MASTERCHEF at a time if you have to arrange these letters in the same manner as these letters are arranged in english alphabet? (! represents factorial in options)
Q . 1,4,9,16,...... sum of this sequence upto 20 terms will be