10.
Find the greatest number of four digits which is divisible by 15, 20 and 25.
Answers
Step-by-step explanation:
The greatest 4-digit number exactly divisible by 10, 15, 20 is?
Q - The greatest 4-digit number exactly divisible by 10, 15, 20 is?
Soln: Any multiple of 60 will be divisible by 10, 15 and 20.
10 x 6 = 60
15 x 4 = 60
20 x 3 = 60
60, therefore is the of numbers 10, 15, 20.
Now, the greatest 4-digit number is 9999.
So the number closest to (but less than) 9999 that is a perfect multiple of 60 will be the answer.
By checking all the multiples of 60 until it crosses 9999, we can find our answer. We can see
60 x 166 = 9960
60 x 167 = 10020
Therefore, your answer is 9960.
Alternately, to find the answer, we can divide 9999 by 60.
9999 / 60 = 166.65
So we know (60 x 166) will be less than 9999 and (60 x 167) will be more than 9999.
hope this helps you better
Answer:
9999 is the correct answer