Предмет: Математика, автор: POGREBNOY770712

Які з поданих чисел діляться на 3, але не діляться на 2?

варіанти відповідей

4722

5100

6003

2701
СРОЧНО

Ответы

Автор ответа: Guppy2016

1

признак делимости на 3 -сумма цифр числа должно делится на 3

признак делимости на 2 - число оканчивается на четную цифру или на 0

начнём с признака делимости на 2

4722 - 2 чётное ,делится ,не подходит

5100 - оканчивается на 0 ,делится ,не подходит

6003 - 3 нечетное ,не делится ,подходит

2701- 1 нечетное ,не делится ,подходит

проверим делимость на 3 числа ,которые не делятся на 2

6003

6+0+0+3=9 - сумма цифр

9:3=3 -подходит ,делится

2701

2+7+0+1=10 - сумма цифр

10:3=3ц1/3 -не подходит ,не делится

пподходит 6003

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