Model Questions for SSC CGL (SET-65) ARITHMETIC

1. The average mathematics marks of two Sections A and B of Class IX in the
annual examination is 74. The average marks of Section A is 77.5 and that of
Section B is 70. The ratio of the number of students of Section A and B

(a) 7: 8
(b) 7: 5
(c) 8: 7
(d) 8: 5

2. The average weight of a group of 20 boys was calculated to be 89.4 kg and
it was later discovered that one weight was misread as 78kg instead of 87 kg.
The correct average weight is

(a) 88.95kg
(b) 89.25kg
(c) 89.55kg
(d) 86.85Kg

3. The diameter of a wheel is 98 cm. The number of revolutions in which it
will have to cover a distance of 1540 m is

(a) 500
(b) 600
(c) 700
(d) 800

4. In an equilateral triangle ABC of side 10cm, the side BC is trisected at
D. Then the length (in cm) of AD is

(a)  3√7
(b) 7√3
(c) 10√7/3
(d) 7√10/3

5. The cost price of an article is Rs. 800. After allowing a discount of
10%, a gain of 12.5% was made. Then the marked price of the article is

(a) Rs. 1,000
(b) Rs. 1,100
(c) Rs. 1,200
(d) Rs. 1,300

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Answers:
1. (c) 2. (d) 3. (a) 4. (c) 5. (a)