7 x 23 = 161
101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 202, 212, 222, 232, 242, 252, 262, 272, 282, 292 20 total
152, 153, 154, 155, 156, 158, 159, 160, 161, 162, 164, 165, 166, 168, 169, 170, 171, 172, 174, 175
There are thirty-nine palindromic numbers between 10 and 400. They are 11, 22, 33, 44, 55, 66, 77, 88, 99, 101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 202, 212, 222, 232, 242, 252, 262, 272, 282, 292, 303, 313, 323, 333, 343, 353, 363, 373, 383, and 393.
They are:103, 105, 107, 109, 111, 113, 115, 117, 119, 121, 123, 125, 127, 129, 131, 133, 135, 137, 139, 141, 143, 145, 147, 149, 151, 153, 155, 157, 159, 161, 163, 165, 167, 169, 171, 173, 175, 177, 179, 181, 183, 185, 187, 189, 191, 193, 195, 197.
There are no such four whole numbers that do, but 131/2 + 141/2 + 151/2 + 161/2 = 60.
320
101, 111, 121, 131, 141, 151, 161, 171, 181 and 191.
7 x 23 = 161
101, 111, 121, 131, 141, 151, 161, 171, 181, 191
There are ten: 101, 111, 121, 131, 141, 151, 161, 171, 181, 191.
131 all have odd numbers, so does 151 and 171. i would say 161 is the one that doesn't belong because it has an even number in it.
THERE ARE 15 PALINDROMIC NUMBERS BETWEEN 100 AND 250 THEY ARE 101,111,121,131,141,151,ETC.
-200
141+20=161, 161/7=23. The answer is 23. It is algebra
the number 161 is a prime number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 have a different name.
1, 2, 3 ,4 ,5, 6 ,7, 8 ,9 ,11, 22, 33, 44, 55, 66 ,77 ,88, 99, 101 ,111, 121 ,131 ,141 ,151 ,161, 171 ,181 ,191, 202, and so forth