A can do a piece of work in 18 days. He worked at it for 12 days and B finished the remaining work in 8 days. B alone can do the whole work in
16 days
24 days
28 days
29 days
B.
24 days
A's 1 day's work =
A's 12 days' work =
Remaining work =
B finishes of work in 8 days.
B can complete the whole work = 8 x 3 = 24 days
The sum of three consecutive natural numbers each divisible by 5, is 225. The largest among them is
85
75
70
80
D.
80
Let the three consecutive natural numbers each divisible by 5 be x, (x+5) and (x+10) respectively.
According to the question,
x + x + 5 + x + 10 = 225
3x + 15 = 225
3x = 210
x = 70
The largest number = x + 10 = 70 + 10 = 80
Possible length of the three sides of a triangle are
2 cm, 3 cm, 6 cm
3 cm, 4cm, 5cm
2.5 cm, 3.5 cm, 6cm
4cm, 4cm, 9cm
B.
3 cm, 4cm, 5cm
By option (2),
52 = 3^{2} + 4^{2}
25 = 9 + 16
25 = 25
An article was sold at ₹ 950/- allowing 5% discount on the marked price. The marked price of the article is:
₹ 960
₹ 1000
₹ 955
₹ 945
B.
₹ 1000
Let the marked price of the article = ₹ x
According to the question,
The list price of an article is ₹ 900/- It is available at two successive discounts of 20% and 10%. The selling price of the article is
₹ 640
₹ 648
₹ 540
₹ 548
B.
₹ 648
Selling price of the article =
= ₹ 648
The time taken by a train 160 m long, running at 72 km/hr, in crossing an electric pole is
8 sec
9 sec
6 sec
4 sec
A.
8 sec
Required time =
A man spends a part of his monthly income and saves the rest. The ratio of his expenditure to the saving is 61 : 6. If his monthly income is ₹ 8,710/-. the amount of his monthly savings is
₹ 870
₹ 690
₹ 980
₹ 780
D.
₹ 780
Amount of monthly savings =
= ₹ 648
A person loses 75% of his money in the first bet, 75% of the remaining in the second and 75% of the remaining in the third bet and returns home with Rs. 2 only. His initial money was
₹ 64
₹ 128
₹ 256
₹ 512
B.
₹ 128
Let the initial money = ₹ x
According to the question
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