One.
18.4286
645, 1290, 1935, 2580, 3225, 3870, 4515, 5160, 5805, 6450, 7095, . . .
9000 9999-1000 equals 8999 if you add the 1 from 1000 you will get 9000
There are infinitely many numbers that are multiples of both 5 and 6. They are multiples of their lowest common multiple, which for 5 and 6 is 30; ie they are the numbers: 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 360, 390, 420, 450, 480, 510, 540, 570, 600, 630, 660, 690, 720, 750, 780, 810, 840, 870, 900, 930, 960, 990, 1020, 1050, 1080, 1110, 1140, 1170, 1200, 1230, 1260, 1290, 1320, 1350, 1380, 1410, 1440, 1470, 1500, 1530, 1560, 1590, 1620, 1650, 1680, 1710, 1740, 1770, 1800, 1830, 1860, 1890, 1920, 1950, 1980, 2010, 2040, 2070, 2100, 2130, 2160, 2190, 2220, 2250, 2280, 2310, 2340, 2370, 2400, 2430, 2460, 2490, 2520, 2550, 2580, 2610, 2640, 2670, 2700, 2730, 2760, 2790, 2820, 2850, 2880, 2910, 2940, 2970, 3000, ... Pick any two you like.
The lowest common multiple of 5 and 6 is 30, so ALL MULTIPLES of 30 are divisible by both 5 and 6, namely: 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 360, 390, 420, 450, 480, 510, 540, 570, 600, 630, 660, 690, 720, 750, 780, 810, 840, 870, 900, 930, 960, 990, 1020, 1050, 1080, 1110, 1140, 1170, 1200, 1230, 1260, 1290, 1320, 1350, 1380, 1410, 1440, 1470, 1500, 1530, 1560, 1590, 1620, 1650, 1680, 1710, 1740, 1770, 1800, 1830, 1860, 1890, 1920, 1950, 1980, 2010, 2040, 2070, 2100, 2130, 2160, 2190, 2220, 2250, 2280, 2310, 2340, 2370, 2400, 2430, 2460, 2490, 2520, 2550, 2580, 2610, 2640, 2670, 2700, 2730, 2760, 2790, 2820, 2850, 2880, 2910, 2940, 2970, 3000, ...
Just 1.
7 is the perfect square for 1290
1,290 is not a perfect square. The approximate square root is ± 35.916569992136
1290 doesn't have any factors that are perfect squares other than 1.
It is: 25
You need at least two numbers to find a GCF. If that's 12 and 8, the GCF is 4.
It is: 1
1290 = 2 x 3 x 5 x 43
40% of 1290= 40% * 1290= 0.4 * 1290= 516
1, 2, 3, 5, 6, 10, 15, 30, 43, 86, 129, 215, 258, 430, 645, 1290.
1294
2009 - 1290 = 719