CDS I 2019 Elementary Mathematics Previous Year Paper (03-Feb-2019)

Question 1

What is the remainder when (17 29 + 19 29 ) is divided by 18?

Accepted Answer

0

Answer

6

Answer

2

Answer

1

Question 2

What is the largest value of n such that 10 ndivided the product?2 5&times; 3 3&times; 4 8&times; 5 3&times; 6 7&times; 7 6&times; 8 12 &times; 9 9&times; 10 6&times; 15 12 &times; 20 14 &times; 22 11 &times; 25 15 ?

Accepted Answer

65

Answer

55

Answer

50

Answer

45

Question 3

How many pairs (A, B) are possible in the number 479865AB if the number is divisible by 9 and it is given that the last digit of the number is odd?

Accepted Answer

5

Answer

6

Answer

9

Answer

11

Question 4

Consider the multiplication 999 &times; abc = def132 in decimal notation, where a, b, c, d, e and f are digits. What are the values of a, b, c, d, e and f respectively?

Accepted Answer

8, 6, 8, 8, 6, 7

Answer

6, 6, 8, 6, 8, 7

Answer

8, 6, 8, 6, 7, 8

Answer

6, 8, 8, 7, 8, 6

Question 5

Three cars A, B and C started from a point at 5 p.m., 6 p.m. and 7 p.m. respectively and travelled at uniform speeds of 60 km/hr., 80 km/hr. and x km/hr. respectively in the same direction. If all the three met at another point at the same instant during their journey, then what is the value of x?

Accepted Answer

120

Answer

110

Answer

105

Answer

100

CDS I 2019 Elementary Mathematics Previous Year Paper (03-Feb-2019)

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