Ques 1 Number System
Find the number of trailing zero in 100! ?
a) 20
b) 22
c) 24
d) 25
100!
=(100⁄5)+(100⁄25)+(100⁄125)100!
=20+4+0100!
=24Ques 2 Number System
Find the number of Unit Digit of 1345 ?
a) 3
b) 9
c) 7
d) 1
3,9,7,1
.3,9,7,1
so at 45th place, the unit digit is 3.3,9,7,1
numbers so 3 is the unit digit.Ques 3 Number System
What is the greatest five-digit number that is completely divisible by 8, 15, 16, 21 and 5 ?
a) 95760
b) 95765
c) 95120
d) 95769
Ques 4 Number System
When (224 – 1) is divided by 7 , the remainder is
a) 4
b) 2
c) 1
d) 0
Ques 5 Number System
If the five-digit number 672 xy is divisible by 3, 7 and 11, then what is the value of (6x + 5y) ?
a) 16
b) 32
c) 17
d) 43
Ques 6 Number System
If the nine-digit number 87605x31y is divisible by 72, then the value of 2x-3y is:
a) 0
b) 1
c) 2
d) 3
Ques 7 Number System
If 7183 +7383 is divided by 36, the remainder is:
a) 0
b) 4
c) 7
d) 9
Ques 8 Number System
If 3147 +4347 is divided by 37, the remainder is:
a) 0
b) 4
c) 7
d) 9
Ques 9 Number System
If the number 4A306768B2 is divisible by both 8 and 11, then the smallest possible values of A and B will be
a) A = 3, B = 5
b) A = 5, B = 4
c) A = 5, B = 2
d) A = 5, B = 3
Ques 10 Number System
The unit digit in the product (124)372 + (124373 is.
a) 10y+8
b) y+8
c) 11y-8
d) y-8