2 What should be the maximum value of B in the following equation ? 5A9 - 7B2 + 9C6 = 823 A) 5 B) 6 C) 7 D) 9
5 A positive integer, which when added to 1000, gives a sum which is greater than when it is multiplied by 1000. This positive integer is : A) 1 B) 3 C) 5 D) 7
6 A boy multiplies 987 by a certain number and obtains 559981 as his answer. If in the answer, both 9's are wrong but the other digits are correct, then the correct answer will be : A) 553681 B) 555181 C) 555681 D) 556581
8 There are four prime numbers written in ascending order. The product of the first three is 385 and that of the last three is 1001. The last number is : A) 11 B) 13 C) 17 D) 19
13 How many of the following numbers are divisible by 3 but not by 9 ? 2133, 2343, 3474, 4131, 5286, 5340, 6336, 7347, 8115, 9276 A) 5 B) 6 C) 7 D) None of these
14 The difference between the squares of two consecutive odd integers is always divisible by : A) 3 B) 6 C) 7 D) 8
15 If x and y are positive integers such that (3x + 7y) is a multiple of 11, then which of the following will also be divisible by 11 ? A) 4x + 6y B) x + y + 4 C) 9x + 4y D) 4x - 9y