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Aptitude - Number System Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to Number System. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Answer : B
Explanation
= 20 + 15 x 3.5
= 20 + 15 x (7/2)
= 20 + 52.5
= 72.5
Answer : D
Explanation
131 has unit digit 3. 132 has unit digit 9. 133 has unit digit 7. 134 has unit digit 1. This will form a pattern 3-7-9-1. So 1332 has unit digit 1 and 1335 has unit digit as 7.
Q 3 - If p and q are odd numbers, then which of these is even?
Answer : B
Explanation
Sum of two odd numbers is even
Example:
p = 19, q = 37
p + q = 56 i.e. even.
Answer : A
Explanation
G.P: a = 2, r = 22⁄2 = 2, n = 11
Sn = a( rn - 1)⁄(r - 1) = 2 x ( 211 - 1)⁄(2 - 1) = 2 x (2048 - 1)
Therefore, Sn = 4094
Answer : B
Explanation
999 is the largest three digit number.
On dividing 999 by 32, remainder is 7.
999 - 7 = 992
Therefore, 992 is the largest three digit multiple of 32.
Q 6 - Which of the following number divides 461 + 462 + 463 + 464 completely?
Answer : B
Explanation
461 + 462 + 463 + 464 = 460 x (41 + 42 + 43 + 44) = 460 x (4 + 16 + 64 + 256) = 460 x 340 which is divisible by 10.
Answer : A
Explanation
y = 587 x 999 = 587 x (1000 - 1) = 587 x 1000 - 587 = 587000 - 587 = 586413
Answer : B
Explanation
y = 217 x 217 + 183 x 183 = (217)2 + (183)2 = (200 + 17)2 + (200 -17)2 Using formulae (a+b)2 = a2 + b2 + 2ab and (a-b)2 = a2 + b2 - 2ab (a+b)2 + (a-b)2 = 2(a2 + b2) ∴ y = 2 x [(200)2 + (17)2] = 2 x [40000 + 289] = 2 x 40289 = 80578
Answer : D
Explanation
First five prime numbers are 2, 3, 5, 7, 11. Sum - 28
Answer : B
Explanation
5 + 1 + 7 + p + 3 + 2 + 4 = 22 + x which is divisible by 3 ∴ x = 2