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How many numbers between 1 and 100 have 5 ones?
None. No number between 1 and 100 has 5 of any digit.This is incorrect. The question asks how many has five ones, not digits.the number five has five ones in the ones column the number 50 has five tens in the tens column. so the answer is 10: 5,15,25,35,45,55,65,75,85,95. Al these numbers have five ones in the ones column.
If a number is not divisible by 10 then itis not divisible by 5?
It's false because we have numbers that is divisible by 10 but not divisible by 5 and vice versa, we have numbers that is divisible by 10 but not divisible by 5.
Are all numbers that are divisible by 5 are also divisible by 10?
Yes, all numbers that are divisible by 5 are also divisible by 10. This is because 10 is a multiple of 5, meaning it can be divided evenly by 5. Therefore, any number that can be evenly divided by 5 can also be evenly divided by 10.
Can all numbers that are divisible by 5 also be divisible by 10?
No. 15 is divisible by 5.
Why is a number with 0 in the ones place divisible by 10?
The number immediately to the left of the ones place is the tens place or the 101 place. Since the value of any digit, d, there would be d*101 = d*10, it will be divisible by 10. The next number to the left is the hundreds place or the 102 place. Since the value of any digit, d, there would be d*102 = d*100, it will be divisible by 10. All the numbers further to the left have place values that are higher integer powers of 10 and so whatever the digit in that place, they will be divisible by 10. And so the answer follows.
