What is the next number of the following sequence 142, 251, 381, 463, .....?

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20 Oct 2014 Sequence

What is the next number of the following sequence
142, 251, 381, 463, .....?

OPtion

1) 527
2) 558
3) 421
4) 466
5) 574
6) 585
7) 454
8) 572
9) 432
10)None of these

Solution

Add the digit and its multiplication
142 = 1*4*2+(1+4+2) = 15 reverse is 51
first digit in increase by 1 251
251 = 2*5*1+(2+5+1) = 18 reverse the number 81
first digit in increase by 1 381
381 = 3*8*1+(3+8+1) = 36 reverse is 63
first digit in increase by 1 463
463 = 4*6*3+(4+6+3) = 85 reverse is 58
first digit in increase by 1 558
558

Option: 2

Correct Option: 2 Best Solution (1)

santosh kumar patel   10 years AGO

1*4*2+(1+4+2)=15 reverse=51
first digit increased by 1 so 1+1=2
similarly,
4*6*3+(4+6+3)=85 reverse = 58
first digit increased by 1=4+1=5
hence 558

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