Important Maths Questions for SSC CGL Exam
A boat travels 24 km upstream in 6 hours and 20 km downstream in 4 hours. Then the speed of boat in still water and the speed of current are respectively.
(A) 4 kmph and 3 kmph
(B) 4.5 kmph and 0.5 kmph
(C) 4 kmph and 2 kmph
(D) 5 kmph and 2 kmph
Correct Answer : B
A man swims downstream distance of 15 km in 1 hour. If the speed of the current is 5 km/ hr, the time taken by the man to swim the same distance upstream is :
(A) 1 hr 30 min
(B) 45 min
(C) 2 hr 30 min
(D) 3 hrs
Correct Answer : D
The LCM of two multiples of 12 is 1056. If one of the numbers is 132, the other number is
(A) 96
(B) 132
(C) 12
(D) 72
Correct Answer : A
A number which when divided by 10 leaves remainder of 9, when divided by 9 leaves a remainder of 8, and when divided by 8 leaves a remainder of 7, is:
(A) 359
(B) 1359
(C) 1539
(D) 539
Correct Answer : A
A solid cube, whose diagonal is $$ 128 {\ sqrt {2}} \ cm $$, is molded to form a cuboid. The length and width of the cuboid are 512 cm and 160 cm, respectively. What is the height of the cuboid?
(A) 16 cm
(B) 25.6 cm
(C) 20.8 cm
(D) 16.4 cm
Correct Answer : B
If a cube whose side is 7.5 cm, what will be its volume?
(A) $$ {421.875\ cm^{3}}$$
(B) $$ {759.375\ cm^{3}}$$
(C) $$ {631.810\ cm^{3}}$$
(D) $$ {210.94\ cm^{3}}$$
Correct Answer : A
Two numbers are in the ratio x : y . If 2 is added to both numerator and denominator , the fraction becomes $$ 1\over2$$. Find the value of x + y .
(A) 2
(B) 3
(C) 4
(D) 5
Correct Answer : D
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