How many zeroes are there at the end of the number N, if N = 150! + 300! ?  Choose the correct choice from the following choices.
A) 28
B) 31
C) 34
D) 37
E) 40
The number of zeroes at the end of 150! will be less than the number of zeroes at the end of 300!   Hence it is sufficient to calculate the number of zeroes at the end of 150!   The number of zeroes = [150/5] + [150/25] + [150/125] = 30 + 6 + 1= 
<gadget id="calculator">30 + 6 + 1</gadget>
<output>37</output>
37   The answer is 37.
<result>D</result>
How many zeroes are there at the end of the number N, if N = 150! + 300! ?