IMAS 2015 — Upper Primary Grades 5–6 — Round 1 Question 1

Question 1

Which of the following expression is incorrect?

$29+92=(2+9)\times(9+2)$
$47+74=(4+7)\times(7+4)$
$36+63=(3+6)\times(6+3)$
$56+65=(5+6)\times(6+5)$
$38+83=(3+8)\times(8+3)$