Question
A can copy 60 pages in 20 hours, A and B together can
copy 189 pages in 27 hours. Then in how many hours B can copy 12 pages.Solution
Number of pages copied by x in hour = 60/20 = 3
Number of pages copied by x and y in 1 hour = 189/27 = 7
∴ Number of pages copied by y in 1 hour = 7 – 3 = 4
∴ Required time = 4 x 12 = 48 hours
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230 192 172 ? 122 100
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What will come in place of the question mark (?) in the following series?
29, 42, ?, 95, 135, 184
Find the missing term:
2, 6, 15, 31, 56, ?
32   48   96   ?   720   2520
82, 98, 130, 178, 242, ?
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7 47 ? 223 359 527
...
