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Aptitude - Arithmetic Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to Basic Arithmetic. 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 : A
Explanation
Here a = 4, d = 4.5 - 4 = 0.5, n = 105 Using formula Tn = a + (n - 1)d T105 = 4 + (105 - 1) x 0.5 = 56
Answer : A
Explanation
[Y/81][ Y/36]=1 => Y2=81x36 => Y = √ 81x36 =54
Answer : D
Explanation
Sum of n natural numbers is Sn=n(n+1)/2 =99(99+1)/2 =4950
Q 4 - If the sum of four consecutive even numbers is 228, which is the smallest of the numbers?
Answer : B
Explanation
According to the question: x + x + 2 + x + 4 + x + 6 = 228 or, 4x + 12 = 228 or, x = 54 ∴The least even number is 54.
Answer : D
Explanation
Here numbers are 14, 21, ..., 196 which is an A.P. Here a = 14, d = 21 - 14 = 7, Using formula Tn = a + (n - 1)d Tn = 14 + (n - 1) x 7 = 196 => 7 - 7n = 196 => n = 189 / 7 = 27
Q 6 - How many odd numbered pages are present in a book of 1089 pages?
Answer : D
Explanation
Here pages are 1, 3, ..., 1089 which is an A.P. Here a = 1, d = 2, l = 1089 Using formula Tn = a + (n - 1)d Tn = 1 + (n - 1) x 2 = 1089 => 2n -1 = 1089 => n = 1090 / 2 = 545
Answer : C
Explanation
Here a = 2, r = 3, n = 8. Using formula Tn = arn- 1 Tn = 2 x 3(8-1) =2 x 37 =2 x 2187 =4374
Answer : D
Explanation
Using formula (13 + 23 ... + n3) = [(1/2)n(n+1]2 (13 + 23 ... + 153) = [(15 x 16)/2]2 = 1202 = 14400
Answer : C
Explanation
(22 + 42 ... + 202) = (1 x 22 + 22 x 22 + 32 x 22 +... + 102 x 22) = 22(12 + 22 + .... + 102) = 4 x 385 = 1540
Answer : C
Explanation
Using formula (13 + 23 ... + n3) = [(1/2)n(n+1]2 (13 + 23 ... + 203) = [(20 x 21)/2]2 = 2102 = 44100 Using formula (1 + 2 + ... n) = [(1/2)n(n+1] ∴ (13 + 23 ... + 153) - (1 + 2 + ... + 15) = 44100 - (1/2) x 15 x 16 = 44100 - 120 = 43980
aptitude_arithmetic.htm
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