It is less than 100,000. It is an even number. It is divisible by 2 3 and 6. None of the digits are less than 4. None of the digits are used more than once. The sum of the digits is 30. The digit...

It is less than 100,000. It is an even number. It is divisible by 2 3 and 6. None of the digits are less than 4. None of the digits are used more than once. The sum of the digits is 30. The digit...

I don't know how to prove this

The answer is 217 but I don't know the solution

Jay has 9 cupboards with the numbers 1 to 9 written. He has to form 3 three-digit numbers which are divisible by 9 with these cardboards and arrange them in ascending order. In how many different...

r => row of chairs x => total amount of chairs When you try to make 5 rows, there's 12 chairs left over. When you try to make 7 rows, there's 4 chairs too little. And...

NOTE THAT,the sequence doesn't matter.such that (1,2,3,4) and (1,3,2,4) are same

question is been relates to junior maths olympiad prectice test.for class 5

What is the least number that is divisible by 2, 3, 4, 5, 6, 8, 9 and 10?

Prove that (a + b + c)333 - a333 - b333 - c333 is divisible by (a + b + c)3 - a3 - b3 - c3 How can I start this? Thanks...

Let a, b, and c be integers with a≠0. Prove that if a|b and b|c then a|c.

I left my glasses at home so I couldn't quite see the number on the board. The first digit was a 7 and the last was a 4, but I couldn't make out the middle numbers. It was certainly a 4 digit number...

each digit can be used only once

Next year Charlie will be half the age of Gwen. Gwen will be 6 years older than Charlie next year. How old is Gwen this year?

Scott earned $35, $40, $40, $25, and $45 for 5 weeks of part-time work. During a school break, he worked-full-time for one week and earned $187. How much greater were his mean weekly earnings with...