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SSC CGL 2015 Important Questions

If I walk at 5 km/hr, I miss a train by 7 minutes. However, if I walk at 6 km/hr, I reach the station 5 minutes before the departure of the train. The distance between my house and the station is

(A) 6 km
(B) 5 km
(C) 6.5 km
(D) 7 km

Correct Answer : (A) 6 km

Average age of A, B and C is 84 years. When D joins them, the average age becomes 80 years. A new person, E, whose age is 4 years more than D, replaces A and the average of B, C, D and E becomes 78 years. What is the age of A?

(A) 80 years
(B) 50 years
(C) 60 years
(D) 70 years

Correct Answer : (A) 80 years

Sixteen men can complete a work in fifteen days, twenty-four children can do the same work in twenty days. In how many days will eight men and eight children together, complete the same work?

(A) 20 days
(B) 18 days
(C) 16 days
(D) 13 1/3 days

Correct Answer : (A) 20 days

AC is a chord of circle whose centre is at O. If B is any point on the arc AC and OCA 20 , then the magnitude of ABC is

(A) 140°
(B) 110°
(C) 100°
(D) 40°

Correct Answer : (B) 110°

Find the least number which when divided by 12, 18, 36 and 45 leaves the remainder 8, 14, 32 and 41 respectively

(A) 178
(B) 186
(C) 176
(D) 180

Correct Answer : (C) 176

20% raise of price followed by a discount of 25% of the raised portion will

(A) increase price by 15%
(B) decrease price by 15%
(C) increase price by 10%
(D) decrease price by 5%

Correct Answer : (A) increase the price by 15%

If a, b, c are positive and a + b + c = 1, then the least value of 1/a + 1/b + 1/c is

(A) 1
(B) 9
(C) 5
(D) 3

Correct Answer : (B) 9

Rs555 was to be divided among A, B and C in the ratio of 1/4:1/5:1/6 . But by mistake it was divided in the ratio of 4 : 5 : 6. The amount in excess received by C was

(A) Rs62
(B) Rs72
(C) Rs75
(D) Rs22

Correct Answer : (B) Rs72

There are two cones. The curved surface area of one is twice that of the other. The slant height of the latter is twice that of the former. The ratio of their radii is

(A) 4 : 1
(B) 4 : 3
(C) 3 : 4
(D) 1 : 4

Correct Answer : (A) 4 : 1