What is the next number of the following sequence 79, 159, 279, 519, .......

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13 Jun 2016 Sequence

What is the next number of the following sequence
79, 159, 279, 519, .......

OPtion

1) 549
2) 596
3) 619
4) 579
5) 669
6) 636
7) 609
8) 682
9) 639
10)None of these

Solution

79
79 => 79+ (7+1)*(9+1) = 79+ 8*10 = 79+80 = 159
159 => 159+ (1+1)*(5+1)*(9+1) = 159+ 2*6*10 = 159+ 120 = 279
279 => 279+ (2+1)*(7+1)*(9+1) = 279+ 3*8*10 = 279+ 240 = 519
Similarly
519 => 519+ (5+1)*(1+1)*(9+1) = 519+ 6*2*10 = 519+ 120 = 639

Option 9)

Correct Option: 9 Best Solution (1)