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Let the C.P. of an article be Rs. x. According to the question, 120% of C.P. + 8 = 130% of C.P. ⇒ 130% of x – 120% of x = 8 ⇒ 10% of x = 8 ⇒ 10/100 × x = 8 ⇒ x = 80 Original C.P. of 16 article = 16x ⇒ Required C.P. = 16 × 80 ⇒ Required C.P. = Rs. 1280 ∴ The original cost price of 16 such articles is Rs. 1280
15, 120, 840, 5040, ?, 100800
11Â Â Â Â Â Â Â Â Â Â 22.5Â Â Â Â Â Â Â 47Â Â Â Â Â Â Â Â Â Â 102Â Â Â Â Â Â Â Â 236Â Â Â Â Â Â Â Â ?
...What will come in place of the question mark (?) in the following series?
2.5, 6.5, 18.5, 54.5, 162.5, 486.5, ?
140, 146, 158, 176, ?, 230
17    18      14       ?      7       32
...10, 10, 30, 150, ?, 9450
17, 19, 41, 127, 513, ?Â
116, 118, 124, 136, 156, ?
-1, 5, 23, 59, ?
84, 97, ?, 162, 214, 279