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What is a multiple of both 3 and 7?

Updated: 9/24/2023
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βˆ™ 9y ago

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All multiples of their lowest common multiple (which is 71), so pick any one you like from:

21, 42, 63, 84, 105, 126, 147, 168, 189, 210, 231, 252, 273, 294, 315, 336, 357, 378, 399, 420, 441, 462, 483, 504, 525, 546, 567, 588, 609, 630, 651, 672, 693, 714, 735, 756, 777, 798, 819, 840, 861, 882, 903, 924, 945, 966, 987, 1008, 1029, 1050, 1071, 1092, 1113, 1134, 1155, 1176, 1197, 1218, 1239, 1260, 1281, 1302, 1323, 1344, 1365, 1386, 1407, 1428, 1449, 1470, 1491, 1512, 1533, 1554, 1575, 1596, 1617, 1638, 1659, 1680, 1701, 1722, 1743, 1764, 1785, 1806, 1827, 1848, 1869, 1890, 1911, 1932, 1953, 1974, 1995, 2016, 2037, 2058, 2079, 2100, ...

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Q: What is a multiple of both 3 and 7?
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Related questions

Least common multiple of 3 and 7?

The (LCM) Least Common Multiple of 7 and 3 is 21 because that is the LEAST number that both 3 and 7 go into.


Lcm 3 and 7?

The (LCM) Least Common Multiple of 7 and 3 is 21 because that is the LEAST number that both 3 and 7 go into.


What number is both a factor and multiple of 7?

The only number that could be both a factor and a multiple is 7 itself.


How is 21 the least common multiple of 7 and3?

21 is the smallest number that both 7 and 3 divide into evenly with no remainder.


What number is a multiple of both 3 and 7?

21, 42, 63, 84, 105, 126 . . . infinity.


What is the largest multiple of 3 and 7?

There is no such number. Since if x were the largest multiple of 3 and 7 then what about 2x? 2x would be a multiple of 3 since x is a multiple of 3; 2x would be a multiple of 7 since x is a multiple of 7; and 2x is bigger than x. So x cannot be the largest.


Why is 126 the common multiple of 18 and 42?

Because 18*7 = 126 and 42*3 = 126 126 is a multiple of both, 18 and 42, and so it is their common multiple.


Why is 21 a multiple of 7?

21 is a multiple of 7 because, 3*7 = 21


Is 119 a multiple of 7 or 3?

It's a multiple of 7 (17 x 7) but not 3 (the digits 119 don't add up to 3)


What is the least common multiple of 2 7 and 3?

The answer is 42 (easiest way to start is 2*3*7)The least common multiple of 2 , 3 , 7 = 42


What is the smallest number that is a multiple of both 5 and 7?

The lowest common multiple of 5 and 7 is 35.


What is the least common multiple of 3 7 and 12?

The LCM of 3, 7, and 12 is: 84