1. The smallest number which when diminished by 7, is divisible 12, 16, 18, 21 and 28 is:

1008 | 1015 | 1022 | 1032 |

2. Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ?

4 | 10 | 15 | 16 |

3. 252 can be expressed as a product of primes as:

2 x 2 x 3 x 3 x 7 | 2 x 2 x 2 x 3 x 7 | 3 x 3 x 3 x 3 x 7 | 2 x 3 x 3 x 3 x 7 |

4. The greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively, is:

123 | 127 | 235 | 305 |

6. What is the smallest number which when diminished by 12, is divisible 8, 12, 22 and 24?

276 | 264 | 272 | 268 |

7. The H.C.F. of two numbers is 23 and the other two factors of their L.C.M. are 13 and 14. The larger of the two numbers is:

276 | 299 | 322 | 345 |

8. 504 can be expressed as a product of primes as

2 × 2 × 3 × 3 × 7 × 7 | 2 × 3 × 3 × 3 × 7 × 7 | 2 × 3 × 3 × 3 × 3 × 7 | 2 × 2 × 2 × 3 × 3 × 7 |

9. The L.C.M. of two numbers is 48. The numbers are in the ratio 2 : 3. Then sum of the number is:

28 | 32 | 40 | 64 |

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