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65.6 is already rounded to the nearest tenth for example 6.28 rounded to the nearest tenth is 6.3 example2: 6.24 rounded to the nearest tenth is ...
You can't convert font size to logMAR. The size of font would depend on what size screen the chart is to be shown or which printer it would be printed on and what dpi the screen or printer is.A logMAR eye test chart should be in the standard SLOAN font, you can download it from the internet. The letters in the top line of the chart should measure 44mm in height and have a letter spacing of 200% for a chart to be read at a distance of 3 meters. This line will correspond to the 20/200 or 6/60 line of the eye test chart. You can then work out all the other lines as follows:FootMetreDecimalLogMARSize@3m20/2006/600.101.0044.00mm20/1606/480.1250.9035.20mm20/1256/380.160.8027.50mm20/1006/300.200.7022.00mm20/806/240.250.6017.60mm20/636/190.320.5013.90mm20/506/150.400.4011.00mm20/406/120.500.308.80mm20/326/9.50.630.207.00mm20/256/7.50.800.105.50mm20/206/6.01.000.004.40mm20/166/4.81.25−0.103.52mm20/12.56/3.81.60−0.202.75mm20/106/3.02.00−0.302.20mm
12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 168, 180, 192, 204, 216, 228, 240, 252, 264, 276, 288, 300, 312, 324, 336, 348, 360, 372, 384, 396, 408, 420, 432, 444, 456, 468, 480, 492, 504, 516, 528, 540, 552, 564, 576, 588, 600, 612, 624, 636, 648, 660, 672, 684, 696, 708, 720, 732, 744, 756, 768, 780, 792, 804, 816, 828, 840, 852, 864, 876, 888, 900, 912, 924, 936, 948, 960, 972, 984, 996.
All multiples of the lowest common multiple of 4 and 6 are divisible by 4 and 6. lcm(4, 6) = 12, thus the numbers: 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 168, 180, 192, 204, 216, 228, 240, 252, 264, 276, 288, 300, 312, 324, 336, 348, 360, 372, 384, 396, 408, 420, 432, 444, 456, 468, 480, 492, 504, 516, 528, 540, 552, 564, 576, 588, 600, 612, 624, 636, 648, 660, 672, 684, 696, 708, 720, 732, 744, 756, 768, 780, 792, 804, 816, 828, 840, 852, 864, 876, 888, 900, 912, 924, 936, 948, 960, 972, 984, 996, 1008, 1020, 1032, 1044, 1056, 1068, 1080, 1092, 1104, 1116, 1128, 1140, 1152, 1164, 1176, 1188, 1200, ... are divisible by both 4 and 6.