VTMO 2013 — Grade 5 — semifinal Question 14
VTMO · VTMO 2013 — Grade 5 — semifinal
Which expression has an even result?
$1 \times 3 \times 5 \times \ldots \times 99$
$2013 \times 2014 + 2015$
$1 \times 2 \times 3 \times \ldots \times 100 + 101$
$2 \times 4 \times 6 \times \ldots \times 100 + 101$
$1 + 3 + 5 + \ldots + 99$