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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