40 Least Common Multiple for two numbers is a number that is divisible exactly by both of the 2 considered numbers. Since 40 here is a multiple of 5, 40 is the smallest number that is divisible by both 5 and 40.
36 is the only square number that is also a triangular number between 20 and 40.
21/40 is less than 1 and so it can't be expressed as a mixed number
They are: 3*7 = 21 and 2*2*2*5 = 40
20/21 times 42 = 40
240
120
40 Least Common Multiple for two numbers is a number that is divisible exactly by both of the 2 considered numbers. Since 40 here is a multiple of 5, 40 is the smallest number that is divisible by both 5 and 40.
36 is the only square number that is also a triangular number between 20 and 40.
840
The least common multiple of 21 , 43 = 903
The number is 1.
To calculate the number of neutrons in an atom of potassium-40, subtract the atomic number (which is 19 for potassium) from the mass number (which is 40 for potassium-40). So, 40 (mass number) - 19 (atomic number) = 21 neutrons in potassium-40.
21/40 is less than 1 and so it can't be expressed as a mixed number
They are: 3*7 = 21 and 2*2*2*5 = 40
To simplify 21 over 40, you need to find the greatest common divisor (GCD) of 21 and 40, which is 1. Then, divide both the numerator and the denominator by the GCD to get the simplified form. Therefore, 21 over 40 simplified is 21/40.
the answer is 21. because you do 40-19