1000+ Speed Maths Questions for Bank Exams - 2
Question: 6
860% of 50 + 50% of 860 = ?
(A) 220
(B) 430
(C) 860
(D) 960
Ans: B
860% of 50 + 50% of 860 = $${860} / {100} × 50$$ + $${50}/{100} × 860$$ = 430 + 430 = 860.
Question: 7
Milk contains 5% water. What quantity of pure milk should be added to 10 litres of milk to reduce this to 2%?
(A) 5 litres
(B) 7 litres
(C) 12 litres
(D) 15 litres
Ans: D
Quantity of pure milk in 10 litres of milk = 9.5 litres
Quantity of milk to be added to:
10 litres of milk of 9.5% strength to convert it of 98% strength = ?
Quantity of water in the milk = 0.5 litre
i.e. 2% = 0.5 litre
∴ 100% = 25 litre
∴ Required quantity of milk to be added = 15 litres
Question: 8
From a container having pure milk, 20% is replaced by water and the process is repeated thrice. At the end of the third operation, the milk is
(A) 40% pure
(B) 50% pure
(C) 50.2% pure
(D) 51.2% pure
Ans: D
Quantity of milk in the container after third operation = 0.8 × 0.8 × 0.8 = 0.512 = 51.2% pure.
Question: 9
What percent of a day is 3 hours?
(A) $$10{1}/{2}$$%
(B) $$12{1}/{2}$$%
(C) $$16{2}/{3}$$%
(D) $$18{2}/{3}$$%
Ans: B
Required percentage = $${3}/{24} × 100$$% = $$12{1}/{2}%$$.
Question: 10
5% of (25% of Rs. 1600) is
(A) Rs. 5
(B) Rs. 10
(C) Rs. 15
(D) Rs. 20
Ans: D
5% of (25% of Rs 1600) = $${5/100} × {25/100} × 1600$$ = Rs. 20.
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