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Question 1
Uma’s father was 38 years when he was born while his mother was 36 years old when his brother 4 years younger to him was born. What is the difference between the ages of his parents?
Question 2
If 20% of A=30% of B=1/6 of C, then A: B: C: is
Question 3
Three numbers are in the ratio 3 : 5 : 7. If the sum of their squares is 21248, then the difference between the highest and lowest number will be
Question 4
A man bought some pencils at the rate of 6 for ₹ 4 and sell them at the rate of 4 for ₹ 6. His gain percentage in total transaction is
Question 5
Mean of 10 numbers is 30. Later on it was observed that numbers 15, 23 are wrongly taken as 51, 32. The correct mean is
Question 6
When a person cycled at 10 km per hour he arrived at his office 6 minutes late. He arrived 6 minutes early, when he increased his speed by 2 km per hour. The distance of his office from the starting place is
Question 7
Out of a sum of Rs.640, a part was lent at 6% simple interest and the other at 9% simple interest. If the interest on the first part after 3 yr is equal to the interest on the second part after 6 yr, then what is the second part?
Question 8
The percentage of metals in a mine of lead ore is 60%. Now the percentage of silver is (3/4)% of metals and the rest is lead. If the mass of ore extracted from this mine is 8000 kg. then mass (in kg) of lead is:
Question 9
Circumference of front and back wheels of truck are 161/12 cm and 207/20cm respectively. At any moment, a chalk mark is put on the point of contact of each wheel with the ground. Find distance travelled by wheel so that both the chalk marks are again on the ground at the same time.
Question 10
A man travels 35 km partly at 4 km/h and at 5 km/h. If he covers former distance at 5 km/h and later at 4 km/h, he could cover 2 km more in the same time. The time taken to cover the whole distance at original rate is:
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Dec 13CDS & Defence
