#137 Zach Walking dogs
#139 Maurice Babysitting
#141 Angelica Gardening
#143 Raquel Housecleaning
First, since all four neighbors live in a row on the same side of the street, and the easternmost house is #143, the houses are (from west to east) numbers 137, 139, 141, and 143.
#137
#139
#141
#143
Raquel lives two houses east of the person who hired Heidi as a babysitter (clue 3); which must be house #141 or #143. She is not in #141 (clue 2); she lives at #143 and the person at #139 employed Heidi as a babysitter.
#137
#139 Babysitting
#141
#143 Raquel
Zach, who had his dogs walked, does not live in #143 (Raquel does), #141 (2), or #139 (that person hired her to babysit), so must live at #137.
#137 Zach Walking Dogs
#139 Babysitting
#141
#143 Raquel
The person who hired a gardener does not live in house #143 (5), #137, or #139, so the person at #141 hired Heidi to do gardening.
By elimination, Raquel hired her for housecleaning.
#137 Zach Walking Dogs
#139 Babysitting
#141 Gardening
#143 Raquel Housecleaning
Since Raquel, a girl, hired Heidi for housecleaning, a man lives at #139 (4), which must be Maurice.
Therefore, Angelica lives at #141.
#137 Zach Walking Dogs
#139 Maurice Babysitting
#141 Angelica Gardening
#143 Raquel Housecleaning
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