top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

For first 10 positive integers find a number as product of numbers before that is same as product of numbers after it?

0 votes
233 views

1, 2, 3, 4, 5, 6, 7, 8, 9, 10
The above are the first 10 positive integers. The product of the numbers before the number __ is the same as the product of the numbers after that number.

posted Sep 13, 2017 by anonymous

Share this puzzle
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

ANSWER IS 7
Before 7 product is 6*5*4*3*2*1 = 720
and after 7 product is 8*9*10 = 720
The product of the numbers before the number ** 7 ** is the same as the product of the numbers after that number.

answer Sep 13, 2017 by Mogadala Ramana



Similar Puzzles
0 votes

Find the largest possible value of positive integer N, such that N! can be expressed as the product of (N-4) consecutive positive integers?

+1 vote

An automorphic number is a number whose square ends in the same digits as the number itself. For example, the number 25 is an automorphic number (in base 10) because its square, 625, ends with the original number.

For the first 100 positive integers, five numbers are automorphic numbers for base 10 (1, 5, 6, 25, and 76), while only one number is automorphic for base 2 (1).

Which of the following bases has the most automorphic numbers for the first 100 positive integers?

a) 15
b) 6
c) 12
d) 7
e) 10

0 votes

First 17 positive integers (1..17) are rearranged into a sequence such that the sum of any two adjacent terms is a perfect square.
What is the sum of the first and last terms of this sequence?

...