7a)532,534,536,538,
b)2142, 4144,6146,8146,
c)300,322,344,366,388
d)222,444,666,888
e)2052,2054,2056,2058,2150,2152,2154,2156,2158
2250,2254,2256,2258,2350,2352,2354,2356,2358,2450,2452,2456,2458,2550,2552,2554,2556,2558,2650,2652,2654,2658,2750,2752,2754,2756,2758,2850,2852,2854,2856,2858,2950,2952,2954,2956,2958
8a)531, 534,537
b)2142, 5145, 8148
c)333,366,399
d)333,666,999
e)2052, 2055, 2058,2154, 2157, 2250, 2253, 2256, 2259, 2352, 2355, 2358, 2451, 2454, 2457, 2550, 2553, 2556,2559, 2652, 2655, 2658, 2751, 2754, 2757, 2850, 2853, 2856, 2859
9a)532,536,
b)4144, 8148
c)344, 388
d)444, 888
e)2052, 2056, 2156, 2256,2352, 2356, 2452, 2456, 2552, 2556, 2652, 2752, 2756, 2852, 2856
10)a)530,535
b)5145
c)300,355
d)555
e)2055,2150,2155,2250,2255,2350,2355,2450,2455,2550,2555,2650,2655,2750,2755,2850,2855,2950,2955
