Grade 6 Math Circles Worksheet - University Of Waterloo, 2015 Page 9
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104. Find the GCD of the following numbers:
(a) 231, 646
(b) 752, 48
(c) 1024, 896
(d) 378, 294
(e) 375, 855
(f) 54320, 5240, 2080
5. Find the LCM of the following numbers:
(a) 21, 22
(b) 92, 48
(c) 96, 56
(d) 126, 294
(e) 560, 40, 160
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6. The volume of a box is 1925
. What are the different possible dimensions of the
box? (Note: the volume of a rectangular box is
.)
7. Using the divisibility tests, determine which numbers (2 to 11) are factors of the fol-
lowing:
(a) 926
(b) 1420
(c) 7848
(d) 39208
8. What is the smallest number that you must multiply 48 by so that the product is
divisible by 45?
9. The eight digit number 1234 678 is divisible by 11. What is the digit
?
10. What is the smallest prime number greater than 200?
11. The four digit number 43
is divisible by 3, 4 and 5. What are the last two digits?
12. The product of three different positive integers is 144. What is the maximum possible
sum of these three integers?
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