There are 3 mothers, each of them have 2 daughters. They all went to the restaurant and there are 7 seats. All of them are seated. How is this possible?
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1 <- grandmother --> grandmother's daughter 2 and 3's daughter -->4 and 5's daughter 6 and 7 So we have 3 mother = 1, 3 and 5 And we have 2 daughter each I.e. 1 = 2 and 3....3 = 4 and 5 ......5 = 6 and 7