What should come in place of ‘?’ in the given series? 99 89 81 75 71 ?
69
Find the differences between consecutive terms: 99 – 89 = 10, 89 – 81 = 8, 81 – 75 = 6 and 75 – 71 = 4.
The amounts subtracted fall by 2 each time (10, 8, 6, 4), so the next amount subtracted is 2.
Therefore the missing term is 71 – 2 = 69.
Check: 99 – 10 = 89, 89 – 8 = 81, 81 – 6 = 75, 75 – 4 = 71 and 71 – 2 = 69 – the subtracted numbers run 10, 8, 6, 4, 2 without a break.
Hence, 69.
What should come in place of ‘?’ in the given series?
3 14 59 240 965 ?
What should come in place of ‘?’ in the given series?
15 24 31 40 47 56 ?
What should come in place of the question mark (?) in the given series?
24 12 12 18 36 ?
What should come in place of ‘?’ in the given series?
8 10 13 18 25 ?
What should come in place of ‘?’ in the given series?
64 32 16 8 4 ?
What should come in place of ‘?’ in the given series?
11 13 20 22 29 31 ?
What should come in place of ‘?’ in the given series?
1 8 17 28 41 ?
What should come in place of ‘?’ in the given series?
5 16 22 33 39 50 56 ?
What should come in place of ‘?’ in the given series?
28, 32, 40, 52, 68 ?
What should come in place of ‘?’ in the given series?
9 14 21 30 41 ?
What will come in place of question mark (?) in the following number series?
2, 5, 11, 23, 44, 77, ?
What will come in place of question mark (?) in the following number series?
31, 32, 36, ?, 61, 86
What will come in the place of question mark (?) in the following number series?
3, 6, 18, ?, 630, 6930
What should come in place of the question mark ‘?’ in the following number series?
60, 40, 50, ?, 180, 460
A series is given with one term wrong. Select that wrong term from the given alternatives.
J12, M24, P48, S96, U192