There are 32 students in a certain school in a math competition, 24 people get the first question right, 18 people get the second question right, 13 people get both questions right, and how many students get neither of the two questions right.
某校32个同学在一次数学竞赛中，答对第一题的有24人，答对第二题的有18人，两题都对的有13人，有多少个同学两题都不对．
<gadget id="calculator">18 - 13</gadget>
<output>5</output>

<gadget id="calculator">24 + 5</gadget>
<output>29</output>

<gadget id="calculator">32 - 29</gadget>
<output>3</output>

<result>3</result>