Question

find the greatest number less than 900 which is divisible by 8 12 and 28​

Answer 1

Answer:

 840

Step-by-step explanation:

28 x 10 = 280...............12 x 70 = 840....................8 x 105 = 840  

28 x 20 = 560...............852, 864, 876,...................848, 856, 864,  

28 x 30 = 840...............888,..................... 880, 888,  

840, 868, 896........................................

Or Other Explanation:-

8 = 2^3  

12 = 3*2^2  

28 = 7*2^2  

Any number divisible by all 3 must have 3, 7, and 2^3 as factors  

3*7*2^3 = 168  

168*5 = 840