Question
Which of the following numbers is divisible by
11?Solution
6148527: Difference = (6 + 4 + 5 + 7) – (1 + 8 + 2) = 22 – 11 = 11
7835246: Difference = (7 + 3 + 2 + 6) – (8 + 5 + 4) = 18 – 17 = 1
4258713: Difference = (4 + 5 + 7 + 3) – (2 + 8 + 1) = 19 – 11 = 8
3487265: Difference = (3 + 8 + 2 + 5) – (4 + 7 + 6) = 18 – 17 = 1
6148527 is divisible by 11.
230, 34.5, ‘?’, 0.77625
3 2 2 3 8 ?
...41 48 89 137 226 ?
...6 10 ? 210 1672 16710
...77 ? 190 257 331 412
...351Â Â Â 261Â Â Â 181Â Â Â 111Â Â Â 51Â Â Â ?
10                          15                          ?                    �...
3Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 5Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 7Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 25Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 8...
7, 8, 12, 21, 37, ?
16 23 31 40 50 61 ?
...
Relevant for Exams:
