Задумали натуральное число, а потом дописали к нему справа 1 цифру, получившееся число больше задуманного на 150. какую цифру дописали?

ответ:

6

пошаговое объяснение:

дописали цифру 6. изначальное число - 16, приписали 6 - получилось 166. 166 - 16 = 150.

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Разделим 98 лет, на 9, 4 и 1 часть. (посколько не указано сколько дочке лет, возьмем 1х) т.е. 98: (9+4+1)=98: 14=7 (лет) - 1 часть или возраст дочки 7*4=28 (лет) - маме и что-бы узнать возраст бабушке есть два способа: 1) 7*9=63 (года) - бабушке или 2) 98-(28+7)=98-35=63 (года) - бабушке. через иксы  дочка - 1х мама - 4х бабушка - 9х 1) 1х+4х+9х=14х а дальше  98: 14х=7 (лет) 7*4=28 (лет) - маме и что-бы узнать возраст бабушке есть два способа: 1) 7*9=63 (года) - бабушке или 2) 98-(28+7)=98-35=63 (года) - бабушке.