The 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?
How many whole numbers between 1 and 1000 do not contain the digit 9?
How many 2-digit integers are there in which the sum of the digits is equal to 11?
Which number has the greatest number of divisors?
What is the smallest positive integer that has 12 different positive divisors, including 1 and itself?
How many integers from 1 to 100 can be written as the sum of 3 consecutive positive integers?
What is the largest sum of two integers such that their product is 787?
An 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?
What is the sum of the digits of all 2-digit numbers?
Find the last three digits of the product:
44444 x 99999
How many 2-digit integers are there in which the sum of the digits is equal to 8?
If 144 is divided into three parts proportional to 7, 8 and 9, then the smallest number is
How many digits are in the product of
2101 and 599?
Choose 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.
How many numbers are in the following list of integers:
1, 2, 4, 8, . . . , 2048?
Estimate the number of Metro stations.
How many sets are there of three consecutive positive integers whose product is equal to their sum?
January 1st, 2014 was a Wednesday.
How many Sundays occurred in 2014?
2014 was not a leap year.
The sum of consecutive integer numbers is 50.
How many numbers are there?
If the sum of two numbers is 8 and their difference is 2, what is their product?
Find two numbers so that their sum, product and the result of division are the same.
What is the largest number?