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Can you solve these somewhat easy maths problems?

I plan to do more of these, each increasing in difficulty from the previous!

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Last updated: January 14, 2019

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First submitted | January 9, 2019 |

Times taken | 1,261 |

Average score | 53.3% |

Rating | 4.62 |

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1.
A download is 84% complete. What fraction is yet to be downloaded?

2.
What is the value of 312 x 7 - 7 x 213?

-7
**✓**

0
**✓**

607
**✓**

693
**✓**

700
**✓**

3.
Which of the following is equal to the number of seconds in one thousandth of one minute?

0.006
**✓**

0.024
**✓**

0.06
**✓**

0.24
**✓**

0.6
**✓**

4.
Which of the following is **not** a multiple of 45?

315
**✓**

495
**✓**

540
**✓**

665
**✓**

855
**✓**

5.
What is the value of ^{1/25} + 0.25?

0.27
**✓**

0.29
**✓**

0.3
**✓**

0.35
**✓**

0.50
**✓**

6.
What are the solutions to the equation x^{3} - 2x^{2} - 5x + 6 = 0?

1, 2 and 3
**✓**

1, 2 and -3
**✓**

1, -2 and 3
**✓**

1, -2 and -3
**✓**

-1, 2 and -3
**✓**

7.
A distance of 8 km is *approximately* 5 miles.

Which of the following is closest to 17.5 miles?

Which of the following is closest to 17.5 miles?

22 km
**✓**

24 km
**✓**

26 km
**✓**

28 km
**✓**

30 km
**✓**

8.
What is the value of

2 + 4 + 6 + 8 + 10 + 12 + 14 + 16/1 + 2 + 3 + 4 + 5 + 6 + 7 + 8

?
1
**✓**

2
**✓**

3
**✓**

4
**✓**

5
**✓**

9.
Which of the following statements is **false**?

12 is a multiple of 2
**✓**

123 is a multiple of 3
**✓**

1234 is a multiple of 4
**✓**

12345 is a multiple of 5
**✓**

123456 is a multiple of 6
**✓**

10.
In the musical *Rent*, a song starts "Five hundred and twenty five thousand six hundred minutes".

Which of the following is closest to this length of time?

Which of the following is closest to this length of time?

a week
**✓**

a month
**✓**

a season (3 months)
**✓**

a year
**✓**

a decade
**✓**

11.
Which of the following is closest to the value 1?

1/1 + ^{1/1}

2/2 + ^{2/2}

3/3 + ^{3/3}

4/4 + ^{4/4}

5/5 + ^{5/5}

12.
In a group of 48 children, the ratio of boys to girls is 3 : 5.

How many boys must join the group to make the ratio of boys to girls 5 : 3?

How many boys must join the group to make the ratio of boys to girls 5 : 3?

24
**✓**

32
**✓**

40
**✓**

48
**✓**

56
**✓**

13.
It has just turned 22:22 on a 24 hour clock. How many minutes until all 4 digits are the same again?

38
**✓**

61
**✓**

98
**✓**

128
**✓**

159
**✓**

14.
You are given a certain number. The difference between ^{1/3} of that number and ^{1/4} of the same number is 3. What is the number given?

24
**✓**

36
**✓**

48
**✓**

60
**✓**

72
**✓**

15.
What is the smallest prime number that is the sum of three different prime numbers?

11
**✓**

15
**✓**

17
**✓**

19
**✓**

23
**✓**

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Isn't the answer 15? (3 + 5 + 7 = 15)

I know that was very nearly the case for me: I was so focused on whether they could be split into prime numbers I wasn't thinking about whether they were prime themselves. I only caught myself from selecting the wrong answer at the last second.

You need to write "=0".

Or, alternatively, call it a polynomial and ask for its roots.