# Mathematics-Multiples and Factors (NSTSE Class 4): Questions 15 - 23 of 99

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## Question number: 15

» Mathematics » Multiples and Factors

### Question

15 and ________ are co-prime numbers.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 30 | |

b. | 25 | |

c. | 35 | |

d. | 28 |

## Question number: 16

» Mathematics » Multiples and Factors

### Question

An example of prime numbers is:

### Choices

Choice (4) | Response | |
---|---|---|

a. | 95 | |

b. | 409 | |

c. | 88 | |

d. | 6 |

## Question number: 17

» Mathematics » Multiples and Factors

### Question

The factor of the number shown on the spike abacus is:

### Choices

Choice (4) | Response | |
---|---|---|

a. | 12 | |

b. | 15 | |

c. | 18 | |

d. | 9 |

## Question number: 18

» Mathematics » Multiples and Factors

### Question

The product of all even numbers between 5 and 9 is:

### Choices

Choice (4) | Response | |
---|---|---|

a. | 35 | |

b. | 48 | |

c. | 45 | |

d. | 36 |

## Question number: 19

» Mathematics » Multiples and Factors

### Question

________ should be subtracted from 553 to make it divisible by 9.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 2 | |

b. | 3 | |

c. | 1 | |

d. | 4 |

## Question number: 20

» Mathematics » Multiples and Factors

### Question

The number is divisible by 3 but not by 6 is:

### Choices

Choice (4) | Response | |
---|---|---|

a. | 18 | |

b. | 12 | |

c. | 30 | |

d. | 27 |

## Question number: 21

» Mathematics » Multiples and Factors

### Question

The prime number just before 17 is:

### Choices

Choice (4) | Response | |
---|---|---|

a. | 13 | |

b. | 15 | |

c. | 16 | |

d. | 19 |

## Question number: 22

» Mathematics » Multiples and Factors

### Question

Observe the following sums. Then find the sum of ?

—————————————–

—————————————–

### Choices

Choice (4) | Response | |
---|---|---|

a. | 36 | |

b. | 56 | |

c. | 63 | |

d. | 81 |

## Question number: 23

» Mathematics » Multiples and Factors

### Question

The next odd number after 56999 is:

### Choices

Choice (4) | Response | |
---|---|---|

a. |
| |

b. | 57, 001 | |

c. |
| |

d. | 56, 990 |