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4.
We need to find the HCF
2261 = 7 x 17 x 19
3059 = 7 x 19 x 161
3325 = 5 x 5 x 7 x 19
Taking the common factors in each one of them
HCF = 7 x 19 = 133
133 is the HCF
7.
LCM of 25, 40 & 60 = 2x2x2x5x5x3
=8x25x3 = 200x3 = 600.
600 perfectly divides the 3 numbers and leaves the remainder as 0.
So, 600+8 = 608
is the smallest number which leaves remainder 8 when divided by 20, 40 &60.
8.
The LCM of 989 and 1892?
Using division method to find the LCM.
2 | 989 , 1892
2 | 989 , 946
11 | 989 , 473
23 | 989 , 43
43 | 43 , 43
| 1 , 1
So, The LCM is
(989, 1892) = 2×2×11×23×43 = 43515
Therefore,
The LCM is 43516.
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