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Evaluate 743 x 999 ? 
A) 724457 B) 784527 C) 742257 D) 74257 Correct Answer : 742257 Explanation : 743 × 999 
How many three digit numbers are divisible by 5? 
A) 200 B) 180 C) 175 D) 10 Correct Answer : 180 Explanation : smallest 3 digit number divisible by 5 is first term, a =100 AP(Arithmetic Progression) So , the three digits number which is divisible by 5 is 180 
X is a whole number. If the only common factors of X and X2 are 1 and X, then X is _______? 
A) 1
B) a perfect square
C) an odd number
D) a prime number
Correct Answer : a prime number Explanation : A number that is divisible only by itself and 1 is called prime number. 
What least number must be added to 3000 to obtain a number exactly divisible by 19? 
A) 1
B) 2
C) 3
D) 4
Correct Answer : 2 Explanation : On dividing 3000 by 19 we get 17 as remainder

Find the unit's digit in the product 2467^{153} * 341^{72}? 
A) 1
B) 3
C) 7
D) 9
Correct Answer : 7 Explanation : 2467^{153} * 341^{72} 
Find the total number of prime factors in 4^{11} *7^{ 5} *11^{2} ? 
A) 17
B) 23
C) 27
D) 29
Correct Answer : 29 Explanation : 4^{11} *7^{ 5} *11^{2}= (2*2) ^{11} *7 5 *11^{2} 
A positive number which when added to 1000 gives a sum , which is greater than when it is multiplied by 1000. The positive integer is? 
A) 1
B) 3
C) 5
D) 7
Correct Answer : 1 Explanation : 1000+N>1000N 
How many numbers between 11 and 90 are divisible by 7? 
A) 10
B) 11
C) 12
D) 7
Correct Answer : 11 Explanation : The required numbers are 14,21,28,...........,84 
Find the sum of all odd numbers up to 100? 
A) 1700
B) 2200
C) 2500
D) 2800
Correct Answer : 2500 Explanation : The given numbers are 1,3,5.........99. 
How many terms are there in 2,4,6,8..........,1024? 
A) 10
B) 14
C) 18
D) 22
Correct Answer : 10 Explanation : Clearly 2,4,6........1024 form a G.P with a=2,r=2 
Find the sum of 2+2^{2}+2^{3}+2^{4}+2^{5}..........+2^{8}=? 
A) 430
B) 440
C) 510
D) 560
Correct Answer : 510 Explanation : Given series is a G.P with a=2,r=2 and n=8. 
Find the number of zeros in 27! (Factorial of 27)? 
A) 2
B) 4
C) 5
D) 6
Correct Answer : 6 Explanation : Number of Trailing Zeros at the end of a factoria 
Find the remainder when 2^{31} is divided by 5? 
A) 3
B) 4
C) 5
D) 7
Correct Answer : 270 Explanation : 2^{10} =1024. 
In doing a division of a question with zero remainder,a candidate took 12 as divisor instead of 21.The quotient obtained by him was 35. The correct quotient is? 
A) 0 B) 12
C) 13
D) 20
Correct Answer : 20 Explanation : Number = Quotient x Divisor + Remainder Divisor taken = 12 Now, the divisor was wrongly taken as 12 instead of 21 So, Quotient = 420/21 = 20 
If a number is multiplied by 22 and the same number is added to it then we get a number that is half the square of that number. Find the number? 
A) 45 B) 46
C) 47
D) 48
Correct Answer : 46 Explanation : Let the required number be x. 
Find the number of zeros in the factorial of the number 18? 
A) 1 B) 2
C) 3
D) 4
Correct Answer : 3 Explanation : Number of Trailing Zeros at the end of a factoria 18! = 6402373705728000 , the number of trailing zeros in 18! is ([18/5]=3) = 3 