Answer without calculation?
2014 as each term contains 2 except 1
2014 elements are even numbers
...........2014 elements are even numbers
from 2! to 2015! each term contains 2
so, 2014 elements are even
but 1! is not an even number..
The sum of 3 single digit numbers is 15 less than their product . If we subtract 2 from first given number then sum of these numbers will become 7 more than their product. Then what will be the product of given 3 numbers?
How many ways are there to pick 2 squares of different colors?