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2013 Section 1 Question 3

3) C

We first need to take the difference between each of their birthdays and see which difference is divisible by 7.
182 – 128 = 54
218 – 128 = 90
281 – 128 = 153
218 – 182 = 36
281 – 182 = 99
281 – 218 = 63

The only difference which is divisible by 7 is 63. This equals to exactly 9 weeks. Adam is born on the 218th day whilst Tara is born on 281st day. This means that Tara was born exactly (exactly means on the same day of the week) 9 weeks after Adam on the same day.
Hence, Adam and Tara is the answer. Option C.

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