Class II

Three number are in the ratio of 3 : 4 : 5 and their L.C.M. is 2400. Their H.C.F. is:
  1. 40
  2. 80
  3. 120
  4. 200
The least multiple of 7, which leaves a remainder of 4, when divided by 6, 9, 15 and 18 is:
  1. 74
  2. 94
  3. . 184
  4. 364
The H.C.F. of two numbers is 11 and their L.C.M. is 7700. If one of the numbers is 275, then the other is:
  1. 279
  2. 283
  3. 308
  4. 318
The greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively, is:
  1. 123
  2. 127
  3. 235
  4. 305
252 can be expressed as a product of primes as:
  1. 2 x 2 x 3 x 3 x 7
  2. 2 x 2 x 2 x 3 x 7
  3. 3 x 3 x 3 x 3 x 7
  4. .2 x 3 x 3 x 3 x 7
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