Centuries: 3rd century BC - 2nd century BC - 1st century BC
Decades: 200s BC 190s BC 180s BC 170s BC 160s BC - 150s BC - 140s BC 130s BC 120s BC 110s BC 100s BC
Years: 161 BC 160 BC 159 BC 158 BC 157 BC - 156 BC - 155 BC 154 BC 153 BC 152 BC 151 BC
156 BC - Births.
Gaius Marius - Roman statesman and general
156 BC - Deaths.
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Centuries: 3rd century BC - 2nd century BC - 1st century BC
Decades: 200s BC 190s BC 180s BC 170s BC 160s BC - 150s BC - 140s BC 130s BC 120s BC 110s BC 100s BC
Years: 162 BC 161 BC 160 BC 159 BC 158 BC - 157 BC - 156 BC 155 BC 154 BC 153 BC 152 BC
157 BC - Births.
Gaius Marius, Roman general and politician
157 BC - Deaths. Including:
Centuries: 3rd century BC - 2nd century BC - 1st century BC
Decades: 210s BC 200s BC 190s BC 180s BC 170s BC - 160s BC - 150s BC140s BC 130s BC 120s BC 110s BC
Years: 169 BC 168 BC 167 BC 166 BC 165 BC - 164 BC - 163 BC 162 BC 161 BC 160 BC 159 BC
Events
In October, Ptolemy VI of Egypt goes to Rome to ask for help from the Senate.
Antiochus V Eupator becomes king in Syria.
Rhodes signs a treaty with Rome and becomes an ally.
Lucius Aemilius Paullus Macedonicus is elected censor in Rome.
In the Battle of Beth Zachariah, the Seleuci ...
Centuries: 3rd century BC - 2nd century BC - 1st century BC
Decades: 210s BC 200s BC 190s BC 180s BC 170s BC - 160s BC - 150s BC 140s BC 130s BC 120s BC 110s BC
Years: 166 BC 165 BC 164 BC 163 BC 162 BC - 161 BC 160 BC 159 BC 158 BC 157 BC 156 BC
Events
Battle of Adasa In his last victory, Judas Maccabaeus defeats the Seleucid general Nicanor.
Centuries: 3rd century BC - 2nd century BC - 1st century BC
Decades: 210s BC 200s BC 190s BC 180s BC 170s BC - 160s BC - 150s BC140s BC 130s BC 120s BC 110s BC
Years: 165 BC 164 BC 163 BC 162 BC 161 BC - 160 BC - 159 BC 158 BC 157 BC 156 BC 155 BC
Events
Berik succeeds Hwala as king of the Goths (approximate date).
Marcus Cornelius Cethegus becomes Roman consul.
Tychandrus becomes Archon of Athens; Sosigenes is a thesmothete (assistant archon).
King Apol ...
Centuries: 3rd century BC - 2nd century BC - 1st century BC
Decades: 200s BC 190s BC 180s BC 170s BC 160s BC - 150s BC - 140s BC 130s BC 120s BC 110s BC 100s BC
Years: 159 BC 158 BC 157 BC 156 BC 155 BC - 154 BC - 153 BC 152 BC 151 BC 150 BC 149 BC
154 BC - Events.
Outbreak of the Lusitanian War and Celtiberian War
154 BC - Births.
Gaius Gracchus, brother of Tiberius Sempronius Gracchus the Roman tribune
Centuries: 3rd century BC - 2nd century BC - 1st century BC
Decades: 210s BC 200s BC 190s BC 180s BC 170s BC - 160s BC - 150s BC140s BC 130s BC 120s BC 110s BC
Years: 168 BC 167 BC 166 BC 165 BC 164 BC - 163 BC - 162 BC 161 BC 160 BC 159 BC 158 BC
Events
Births
Tiberius Sempronius Gracchus, the Roman tribune
Deaths
Category: 160s BC
...
Ninety-one is a triangular number and a hexagonal number, one of the few such numbers to also be a centered hexagonal number, and it is also a centered nonagonal number and a centered cube number. It is the sum of the squares of the first six integers.
It is also the lowest natural number which looks prime but isn't, because neither of its factors 7 and 13 have simple divisibility tests.
It is the smallest positive integer expressible as a sum of two cubes in two different ways if negative roots are allowed: 91 = 63+(-5)3 = 43 ...