Question

Find the 4 - digit greatest number, which is
exactly divisible
by 10, 15 and 25.​

Answer 1

Answer:

9960

Step-by-step explanation:

Any multiple of 60 will be divisible by 10,15and20.10×6=60. 15×4=60. 20×3=60. 60, therefore,is the least common multiple of 10,15and20.Now the greatest four digit number is 9999.so the number closest to(but less than)9999that is a perfect multiple of 60 will be the answer.by checking all the multiples of 60 untill it crosses 9999,we find our answer.we can see-60×166=9960. 60×167=10020.Therefore your answer is 9960.I hope it will help you.