1-5, pg. 278.
Course
GMAT Data Sufficiency
Sal works through 155 data sufficiency problems in the GMAC GMAT Review book (so using real GMAT problems). Buy the book, then watch the videos.
41 Lectures
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6-9, pg. 278.
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10-15, pgs. 278-279.
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16-21, pg. 279.
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22-27, pg. 279.
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28-32, pg. 280.
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33-36, pg. 280.
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37-41, pgs. 280-281.
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42-46, pg. 281.
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47-50, pg. 281.
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51-54, pgs. 281-282.
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55-58, pg. 282.
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59-62, pg. 282.
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63-68, pgs. 282-283.
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68-72, pg. 283.
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73-76, pg. 284.
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77-79, pg. 284.
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80-83, pg. 284.
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84-86, pg. 285.
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87-90, pg. 285.
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91-94, pgs. 285-286.
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95-98, pg. 286.
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99-102, pg. 286.
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103-106, pg. 287.
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107-109, pg. 287.
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110-111, pg. 287.
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112-115, pg. 287.
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116-118, pg. 288.
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119-120, pg. 288.
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121-124, pg. 288.
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125-128, pg. 288.
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129-131, pg. 289.
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132-134, pg. 289.
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135-137, pg. 289.
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138-140, pg. 289.
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141-142, pg. 289-290.
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142-144, pg. 290.
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145-147, pg. 290.
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148-150, pg. 290.
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151-153, pg. 290.
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154-155, pg.290.