1.give N= 1x2x3x........x50.How many the last digits 0 are there
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7,429 has 4 digits
it: 7, 4, 2, 9
264 has 3 digits
it: 2, 6, 4
1. There are four digits in the number 7,429.
2. They are seven, four, two and nine in the number 7,429.
3. The number 7,429 is odd. Because the number end in 9.
4. There are three dgits number in the number 264.
5. They are two, six and four in the number 264.
6. The number 264 is even. Because the number end in 4.
Dịch :Có bao nhiêu chữ số bằng 0 ở hàng triệu?
ở hàng triệu có 6 số 0
ok
1 to 9 have 9 numbers
10 to 99 have 90 numbers
100 to 250 have 151 numbers
in the book have 250 numbers
dich
1 toi 9 co 9 chu so
10 toi 99 co 90 chu so
100 toi 250 co 151 chu so
trong cuon sach co 250 chu so
nho tink cho minh nha
Analyze all factors that really collect divisor is 5. We have:
1 × 5 = 5, 15 = 3 × 5, 25 = 5 × 5, 35 × 5 = 7, 45 = 9 × 5
10 = 2 × 5, 4 × 20 = 5, 30 = 6 × 5, 40 × 5 = 8, 50 = 2x5x5
In 10 charge on all 12 factors 5
Each factor of 5 to 1 that's another even number of administration will have to take the first digit 0
So take advantage of administration area for Bag 12 digits 0
Analyze all factors that really collect divisor is 5. We have: 1 × 5 = 5, 15 = 3 × 5, 25 = 5 × 5, 35 × 5 = 7, 45 = 9 × 5 10 = 2 × 5, 4 × 20 = 5, 30 = 6 × 5, 40 × 5 = 8, 50 = 2x5x5 In 10 charge on all 12 factors 5 Each factor of 5 to 1 that's another even number of administration will have to take the first digit 0 So take advantage of administration area for Bag 12 digits 0