Maths Questions Series #5
Very important Maths questions for SSC CGL
Q : Some persons can do a piece of work in 12 days. Two times the number of such persons will do half of the work in
(A) 5 days
(B) 3 days
(C) 9 days
(D) 6 days
Correct Answer : B
P and Q together can do a job in 6 days. Q and R can finish the same job in 60/7 days. P started the work and worked for 3 days. Q and R continued for 6 days to finish the work. Then the difference of days in which R and P can complete the job alone is
(A) 12 days
(B) 15 days
(C) 10 days
(D) 8 days
Correct Answer : C
Find the forth proportional to $${ x^{2}b^{2}c^{3}}$$, $${ x^{3}bc^{4}}$$ and $${ x^{4}b^{2}c^{2}}$$.
(A) $${ x^{5}bc^{3}}$$
(B) $${ x^{4}bc^{2}}$$
(C) $${ x^{5}b^{3}c^{3}}$$
(D) $${ x^{5}b^{2}c^{5}}$$
Correct Answer : A
Two numbers are in the ratio of 3: 5. If 9 be subtracted from each, then they are in the ratio of 12: 23. Find the numbers.
(A) 33,55
(B) 60,69
(C) 15,28
(D) 36,115
Correct Answer : A
The price of an article is cut by 33 %, to restore its original value, the new price must be increased by
(A) 24.81%
(B) 41.25%
(C) 33%
(D) 49.25%
Correct Answer : D
Ram spends 40 % of his salary on food, 20% on house rent, 10% on entertainment and 10% on conveyance. If his savings at the end of a month are ₹ 1500, then his salary per month (in ₹) is:
(A) ₹ 6000
(B) ₹ 10000
(C) ₹ 8000
(D) ₹ 7500
Correct Answer : D
The ratio of the speeds of the two airplanes is 11: 18. If the first airplane covers a distance of 1650 km in 3 hours, then what is the speed (m / s) of the second airplane?
(A) 270
(B) 200
(C) 250
(D) 225
Correct Answer : C
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