Wipro Aptitude Questions with Solutions 1.The product of two numbers is 2028 and their H.C.F. is 13. The number of such pairs is: A) 1 B) 2 C) 3 D) 4 Answer: B) 2 Explanation: Let the numbers 13a and 13b. Then, 13a x 13b = 2028 =>ab = 12. Now, the co-primes with product 12 are (1, 12) and (3, 4). [Note: Two integers a and b are said to be coprime or relatively prime if they have no common positive factor other than 1 or, equivalently, if their greatest common divisor is 1 ] So, the required numbers are (13 x 1, 13 x 12) and (13 x 3, 13 x 4). Clearly, there are 2 such pairs. 2.The greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively, is: A) 123 B) 127 C) 235 D) 305 Answer: B) 127 Explanation: Required number = H.C.F. of (1657 – 6) and (2037 – 5) = H.C.F. of 1651 and 2032 = 127. 3.Three number are in the ratio of 3 : 4 : 5 and their L.C.M. is 2400. Their H.C.F. is: A) 40 B) 80 C) 120 D) 200 Answer: A) 40 Explanation: Let the numbers be 3x, 4x and 5x.
Comments
Post a Comment