Exam Details
2020 Elementary Mathematics
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Questions
100
Duration
180 mins
Package
Combined Defence Services Examination (I) - Previous Year Papers
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100questions
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33
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100questions
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Sample questions from this paper
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2020 · Unclassified
2020 Elementary Mathematics
The number 2×3×5×7×11+1 is
2020 · Unclassified
2020 Elementary Mathematics
Two unequal pairs of numbers satisfy the following conditions :
(i) The product of the two numbers in each pair is 2160
(ii) The HCF of the two numbers in each pair is 12.
If x is the mean of the numbers in the first pair and y is the mean of the numbers in the second pair, then what is the mean of x and y ?
2020 · Unclassified
2020 Elementary Mathematics
How many digits are there in (54)10 ? (Given that log102 = 0·301 and log103 = 0·477)
2020 · Unclassified
2020 Elementary Mathematics
Which one of the following is a set of solutions of the equation x√x = n√xx, if n is a positive integer ?
2020 · Unclassified
2020 Elementary Mathematics
In a competitive examination, 250 students have registered. Out of these, 50 students have registered for Physics, 75 students for Mathematics and 35 students for both Mathematics and Physics. What is the number of students who have registered neither for Physics nor for Mathematics ?
2020 · Unclassified
2020 Elementary Mathematics
If the sum of the digits of a number 10n − 1, where n is a natural number, is equal to 3798, then what is the value of n ?