qs on number
Fri, 2007-11-16 11:51
Q1. Find the total number of integers between 2 and 40 such that ( n- 1)! Is not divisible by n?
a. 3 b. 4 c. 5 d. 6
Q2. The numbers from 1 to 33 are written side by side as follows:
a234567891011. . . . .. .33.
What is the reminder when above number is divided by 9?
a. 0 b. 1 c. 3 d. 6
__________________
n/a
Fri, 2007-11-16 12:13
#2
HUMRAJ!!!!!!!
Q2. The numbers from 1 to 33 are written side by side as follows:
1234567891011. . . . .. .33.
What is the reminder when above number is divided by 9?
a. 0 b. 1 c. 3 d. 6
Sol.
Sum of all digits of 1234567891011. . . . .. .33 is 3x(9x10)/2 + 10 + 20 + 18 = 183
Ans is 3.
Q1. Find the total number of integers between 2 and 40 such that ( n- 1)! Is not divisible by n?
a. 3 b. 4 c. 5 d. 6
Sol. All prime numbers b/w 2 and 40 as 3, 5, 7, 11, 13, 17, 19, 23, 29, 31 and 37.
I think ans is 11 numbers.