Numbers Aptitude Test Questions(Mcq)

Numbers Aptitude Test Questions(Mcq)
All Questions Answers are Given Below Check it

1.The Unit Digit in the Produt (784×618×917×463)

2
3
5
4

2. 9587-X=7429-4358 then X=?

5011
6516
6511
6173

3.(796×796-204×204)=?

592000
592001
582762
783623

4.(87×87+61×61-2×87×61)=?

295
562
195
196

5. What is the Unit Digit of  7¹⁰⁵   ?

1
5
7
9

6.Which one of the following is not a prime number?

31
61
91
87 

7.(112 x 54) = ?

77000
70000
82444
77733

8.What least number must be added to 1056, so that the sum is completely divisible by 23 ?

3
5
6
2

9. 1397 x 1397 = ?

1951609.
1951611
1826351
3682251

10. How many of the following numbers are divisible by 132 ?
264, 396, 462, 792, 968, 2178, 5184, 6336

8
4
6
5

Show me the answers!

Question 1: The correct answer is the
Answer is A)
Unit Digit in the given product=Unit Digit in(4×8×7×3)=2

Question 2: The correct answer is 
Answer  is B)
9587-X=7429-4358 then X=?
then 9887-X=3071
X=9587-3071=6516

Question 3: The correct answer is 
Answer is C)
By Using this formula-(a²-b²)=(a+b)(a-b)
796×796-204×204=(796)²-(204)²
=(796+204)(796-204)=1000×593=592000

Question 4: The correct answer is 
Answer is D)
By Using the fomula-(a²+b²-2ab)=(a-b)² 
where a=87,b=61
(87²+61²-2×81×61)=(87-61)²=(26)²=(20+6)²
=20²+6²-2x20x6=(400+36-240)
=(436-240)=196.

Question 5: The correct answer is 
Answer is C)
 the Unit Digit of  7¹⁰⁵ =Unit Digit in [(7⁴)²⁶×7]
The Unit Digit in  (7⁴)²⁶=1  
^{then Unit Digit in}  7^{105 =(1x7)=7} 

Question 6: The correct answer is 
Answer is C)
91 is divisible by 7. So, it is not a prime number

Question 7: The correct answer is 
Answer is B)
(112 x 5⁴) = 112 x10/24=112 x 10⁴/16=1120000/6= 70000

Question 8: The correct answer is 
Answer is D)

 23) 1056 (45
      92
      ---
      136
      115
      ---
       21
      ---
     
 Required number = (23 - 21)    
                 = 2.

Question 9: The correct answer is 
Answer is A)

1397 x 1397	= (1397)2
	= (1400 - 3)2
	= (1400)2 + (3)2 - (2 x 1400 x 3)
	= 1960000 + 9 - 8400
	= 1960009 - 8400
	= 1951609.

Question 10: The correct answer is 

Answer is B)

132 = 4 x 3 x 11

So, if the number divisible by all the three number 4, 3 and 11, then the number is divisible by 132 also.

264  11,3,4 (/)

396  11,3,4 (/)

462  11,3 (X)

792  11,3,4 (/)

968  11,4 (X)

2178  11,3 (X)

5184  3,4 (X)

6336  11,3,4 (/)

Therefore the following numbers are divisible by 132 : 264, 396, 792 and 6336.

Required number of number = 4.

You answered them all right!