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Mathematics Multiple Choice #1

Can you solve these somewhat easy maths problems?
I plan to do more of these, each increasing in difficulty from the previous!
Quiz by Stewart
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Last updated: January 14, 2019
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First submittedJanuary 9, 2019
Times taken1,103
Average score60.0%
Rating4.54
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1. A download is 84% complete. What fraction is yet to be downloaded?
1/5
4/25
1/7
1/9
1/10
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 x3 - 2x2 - 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?
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?
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?
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
+1
Level 51
Jul 15, 2022
Question 15

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

+4
Level 68
Jul 15, 2022
15 is not itself prime though.
+3
Level 50
Jan 20, 2023
Great quiz, nominated!
+1
Level 81
Jan 20, 2023
A second nomination from me!
+1
Level 77
Jan 20, 2023
Great quiz! I kinda took my time and before I knew it I had 1 minute for 4 questions! I think the last question is pretty easy and is probably that low because people might be running out of time. Maybe saving a longer question for the end would work best? Maybe the multiples question or kilometres question?
+1
Level 81
Jan 20, 2023
TBH I think part of the reason the answer rate for the last question is low is because a lot of people are getting tripped up on the fact that 15 isn't prime.

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.

+1
Level 64
Jan 20, 2023
Something about negative numbers and polynomials trips me up, I know how to do them but I always get mixed up.
+1
Level 70
Jan 21, 2023
When the number is negative, what I do is mentally add a minus sign in front of all odd powers of x: in fact i sometimes even rewrite this "negative variant" on paper to go through it more easily.
+1
Level 70
Jan 20, 2023
An equation has to have an = sign in it, so for Q6 you should put "what are the solutions to the equation x^3 - 2x^2 - 5x + 6 = 0?". Or you could change it to "what are the roots of the polynomial x^3 - 2x^2 - 5x + 6?"
+1
Level 68
Jan 20, 2023
Fixed thanks
+2
Level 62
Jan 20, 2023
what you call an equation is not an equation.

You need to write "=0".

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

+1
Level 40
Mar 20, 2023
can someone explain why the last one is not 11? 1+3+7 is the smallest no?
+1
Level 68
Mar 20, 2023
1 is not a prime number
+1
Level 64
Oct 27, 2023
the last question was a little bit tricky :)