ID 783

Numbers and Arithmetic K10Which is the smallest?



ID 1010

Numbers and Arithmetic K10The typical healthy resting heart rate in adults is 60–80 beats per minute.
If you live 100 years, how many times will your heart beat?



ID 1064

Numbers and Arithmetic K10How many whole numbers between 1 and 1000 do not contain the digit 9?



ID 1780

Numbers and Arithmetic K10How many 2-digit integers are there in which the sum of the digits is equal to 11?



ID 1947

Numbers and Arithmetic K10Which number has the greatest number of divisors?



ID 1952

Numbers and Arithmetic K10What is the smallest positive integer that has 12 different positive divisors, including 1 and itself?



ID 2029

Numbers and Arithmetic K10How many integers from 1 to 100 can be written as the sum of 3 consecutive positive integers?



ID 2148

Numbers and Arithmetic K10What is the largest sum of two integers such that their product is 787?



ID 2231

Numbers and Arithmetic K10An hour ago, I notched up 78987 kilometers on my odometer.
The number is palindromic, reading the same backwards as forwards.

How fast was I driving during the last hour if the current number on my odometer is also palindromic?



ID 2265

Numbers and Arithmetic K10What is the sum of the digits of all 2-digit numbers?



ID 3144

Numbers and Arithmetic K10The speed of sound at sea level is 333 meters / second.

If the sound of an explosion comes 30 seconds later, how far from me was the center of the explosion?



ID 3182

Numbers and Arithmetic K10Find the last three digits of the product:

44444 x 99999



ID 3199

Numbers and Arithmetic K10How many 2-digit integers are there in which the sum of the digits is equal to 8?



ID 3220

Numbers and Arithmetic K10If 144 is divided into three parts proportional to 7, 8 and 9, then the smallest number is



ID 3301

Numbers and Arithmetic K10How many digits are in the product of

2101 and 599?



ID 3376

Numbers and Arithmetic K10Choose the answer without using a calculator.

Which number is evenly divisible by 8?



ID 3955

Numbers and Arithmetic K10Choose some of the two-digit numbers on the right so that they add up to exactly 100.

How many numbers do you use?

Do not use any number more than once.



ID 4071

Numbers and Arithmetic K10How many numbers are in the following list of integers:

1, 2, 4, 8, . . . , 2048?



ID 4096

Numbers and Arithmetic K10Estimate the number of Metro stations.



ID 4228

Numbers and Arithmetic K10How many sets are there of three consecutive positive integers whose product is equal to their sum?



ID 4538

Numbers and Arithmetic K10January 1st, 2014 was a Wednesday.

How many Sundays occurred in 2014?

2014 was not a leap year.



ID 4704

Numbers and Arithmetic K10What number is largest?



ID 4764

Numbers and Arithmetic K10The sum of consecutive integer numbers is 50.

How many numbers are there?



ID 5008

Numbers and Arithmetic K10Solve this.

F = (a - x) (b - x) (c - x) . . . (z - x)



ID 5045

Numbers and Arithmetic K10If the sum of two numbers is 8 and their difference is 2, what is their product?



ID 5224

Numbers and Arithmetic K10Positive integers and zero are whole numbers.

If N is a whole number, any other whole number can be represented by one of the expressions:



ID 5280

Numbers and Arithmetic K10Find two numbers so that their sum, product and the result of division are the same.

What is the largest number?