Series I: 8, 9, 15, 25, 42, 68, 105
Series II: 60, 180, 450, 900, 1350, 1380, 675
If wrong term in series II is ‘N’, then which statement is true about (N/30 + 1)?
(i) It’s a prime number.
(ii) Sum of the digits is less than 9.
(iii) It’s a nearest multiple of 5 and its remainder is 4.
Explanation:
Wrong term = 1380
Pattern of series –
60 ×3=180
180 ×2.5=450
450 ×2=900
900 ×1.5=1350
1350 ×1=1350
1350 ×0.5=675
(i) 138030 + 1 = 47
47 is a prime number, so statement (i) following
(ii) 1380/30 + 1 = 47
Sum of digits = 4 + 7 = 11
And, 11 > 9
So, statement (ii) did not follow
(iii) 1380/30 + 1 = 47
475, remainder is 2 not 4
So, statement (iii) did not follow