Explanation

243, 81, 27, 9, ?

÷3 pattern:

243 ÷ 3 = 81

81 ÷ 3 = 27

27 ÷ 3 = 9

9 ÷ 3 = 3

Last verified on 15-02-2026

Explanation

100 → 90 (-10)

90 → 80 (-10)

80 → 70 (-10)

70 → 60 (-10)

Last verified on 15-02-2026

Explanation

5 × 2 = 10

10 × 2 = 20

20 × 2 = 40

40 × 2 = 80

Last verified on 15-02-2026

Explanation

2^1 = 2

2^2 = 4

2^4 = 16

2^8 = 256

2^16 = 65536

Last verified on 15-02-2026

Explanation

Step 1: Find the differences between consecutive terms

66 → 63 → difference = 66 − 63 = 3

63 → 57 → difference = 63 − 57 = 6

57 → 45 → difference = 57 − 45 = 12

So the differences are: 3, 6, 12, …

Step 2: Observe the pattern in differences

3 × 2 = 6

6 × 2 = 12

Pattern: The difference doubles each time.

Next difference = 12 × 2 = 24

Step 3: Find the next number

Last number = 45

Subtract next difference: 45 − 24 = 21