Quantitative Aptitude
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Question 1
The Units digit in the product ( 784 x 618 x 917 x 463 ) is
Correct Answer: Option A
Units digit in the given product = Units digit of 4 x 8 x 7 x 3
= Units digit of 672
= 2
Question 2
Find the product of place value and face value of 5 in 65231
Correct Answer: Option A
Place value of 5 in 65231 = 5 x 1000
= 5000
Face value = 5
Required product = 5000 x 5 = 25000
Question 3
(112 x 54) = ?
Correct Answer: Option B
(112 x 54)
| = 112 x |  |
10 |  |
4 | = | 112 x 104 | = | 1120000 | = 70000 |
| 2 | 24 | 16 |
Question 4
(935421 x 625) = ?
Correct Answer: Option D
| 935421 x 625 = 935421 x 54 = 935421 x | |
10 | |
4 |
| 2 |
| = | 935421 x 104 | = | 9354210000 |
| 24 | 16 |
= 584638125
Question 5
(12345679 x 72) = ?
Correct Answer: Option A
| 12345679 x 72 | = 12345679 x (70 +2) |
| = 12345679 x 70 + 12345679 x 2 | |
| = 864197530 + 24691358 | |
| = 888888888 |
Question 6
| (963 + 476)2 + (963 - 476)2 | = ? |
| (963 x 963 + 476 x 476) |
Correct Answer: Option D
| Given Exp. = | (a + b)2 + (a - b)2 | = | 2(a2 + b2) | |
| (a2 + b2) | (a2 + b2) |
= 2
Question 7
-84 x 29 + 365 = ?
Correct Answer: Option C
| Given Exp. | = -84 x (30 - 1) + 365 |
| = -(84 x 30) + 84 + 365 | |
| = -2520 + 449 | |
| = -2071 |
Question 8
A 3-digit number 4a3 is added to another 3-digit number 984 to give a 4-digit number 13b7, which is divisible by 11. Then, (a + b) = ?
Correct Answer: Option D
4 a 3 | 9 8 4 } ==> a + 8 = b ==> b - a = 8 13 b 7 |
Also, 13 b7 is divisible by 11
(7 + 3) - (b + 1) = (9 - b)
(9 - b) = 0
b = 9
(b = 9 and a = 1) (a + b) = 10.
Question 9
4500 x ? = 3375
Correct Answer: Option D
| 4500 x x = 3375 x = |
= | 3 | |
| 4 |
Question 10
If the number 5 * 2 is divisible by 6, then * = ?
Correct Answer: Option B
6 = 3 x 2. Clearly, 5 * 2 is divisible by 2. Replace * by x.
Then, (5 + x + 2) must be divisible by 3. So, x = 2.