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- Question
A person walking 6/7 of his usual rate is 30 minutes late. What is his usual time ?
Options- A. 2 hrs 50 min
- B. 3 hrs 25 min
- C. 3 hrs
- D. 2 hrs 5 min
- Correct Answer
- 3 hrs
ExplanationLet t be the usual time. If the usual rate is 1 unit, then the unusual rate is 6/7.
Balance by the distance,
1 x t = (6/7)(t + 30)
7t = 6(t + 30)
we get t as,
t = 180 minutes = 3 hrs. - 1. If two painters can complete two rooms in two hours, how many painters would it take to do 18 rooms in 6 hours?
Options- A. 2 painters
- B. 6 painters
- C. 4 painters
- D. None Discuss
- 2. A number consists of 3 digits whose sum is 10. The middle digit is equal to the sum of the other two and the number will be increased by 99 if its digits are reversed. The number is :
Options- A. 253
- B. 263
- C. 273
- D. 283 Discuss
- 3. The largest 4 digit number exactly divisible by 88 is
Options- A. 8888
- B. 9999
- C. 9944
- D. 9988 Discuss
- 4. A text book of mathematics cost 2 Rs/- more than a text book of literature. If 5 literature books cost 38 Rs/- more than 3 mathematics books, what is the cost of each literature book?
Options- A. 44
- B. 22
- C. 24
- D. 11 Discuss
- 5. The difference between two numbers is 25. The smaller number is 1/6th of the larger number. What is the value of the smaller number?
Options- A. 10
- B. 5
- C. 50
- D. 25 Discuss
- 6. Find the number which multiplied by 15 is increased by 56 ?
Options- A. 6
- B. 4
- C. 3
- D. 12 Discuss
- 7. What is the common ratio of the following geometric sequence? 4, 2, 1, 0.5, 0.25, 0.125,...
Options- A. 0.5
- B. -1
- C. 1.5
- D. -0.5 Discuss
- 8. A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number ?
Options- A. 2
- B. 4
- C. 6
- D. 8 Discuss
- 9. If 1 is added to the denominator of a traction, the fraction becomes 1/2. If 1 is added to the numerator of the fraction, the fraction becomes 1. The fraction is :
Options- A. 1/3
- B. 2/3
- C. 4/3
- D. 5/3 Discuss
- 10. The sum of the digits of a two-digit number is 9 less than the number. Which of the following digits is at unit's place of the number ?
Options- A. 1
- B. 2
- C. 3
- D. data inadequate Discuss
Problems on Numbers
Search Results
Correct Answer: 6 painters
Explanation:
Two painters can complete two rooms in two hours.So 18 rooms can be painted in 6 hrs by 6 painters
Correct Answer: 253
Explanation:
Let the middle digit be x.
Then, 2x = 10 or x = 5. So, the number is either 253 or 352
Since the number increases on reversing the digits, so the hundred's digit is smaller than the unit's digit.
Hence, required number = 253.
Correct Answer: 9944
Explanation:
To find the largest 4 digit number exactly divisible by 88,
We should divide the largest possible 4 digit number by 88, and if we get any remainder than subtract it from that largest number.
The largest possible 4 digit number is 9999
Now,
88) 9999 (113
88
_______
119
88
_______
319
264
_______
55
_______
Therefore, the largest 4 digit number exactly divisible by 88 is given by
9999 - 55 = 9944.
Correct Answer: 22
Explanation:
Let each literature text book cost be Rs. X
Then, cost of mathematics text book = Rs. (X + 2)
ATQ,
5X = 38 + 3(X + 2)
5X = 38 + 3X + 6
2X = 44
X = 22.
Therefore, cost of each literature text book = Rs. X = Rs. 22.
And that of masthematics = X + 2 = Rs. 24.
Correct Answer: 5
Explanation:
Let the larger number be p
Then, smaller number = 1/6 x p = p/6
Given difference between two numbers = 25
p - p/6 = 25
5p/6 = 25
5p = 150
p = 30
Then, p/6 = 30/6 = 5
Hence, larger number = 30 and smaller number = 5 which makes the difference = 25.
Correct Answer: 4
Explanation:
Let the number be x. Then,
15x - x = 56
x = 4
Correct Answer: 0.5
Explanation:
In mathematics, a geometric progression, also known as a geometric sequence, is a sequence of numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio.
Herein the given sequence, 4, 2, 1, 0.5, 0.25, 0.125,...
Common Ratio r = 2/4 = 1/2 = 0.5/1 = 0.25/0.5 = 0.125/0.25 == 0.5.
Correct Answer: 8
Explanation:
Let the number be v. Then, 3 (2x + 9) = 75.
2x + 9 = 25
=> 2x = 16
=> x = 8
Correct Answer: 2/3
Explanation:
Let the fraction be x/y. Then, x /(y+1) = 1/2
=> 2x - y = 1 ..........(i)and
(x + 1) / y = 1 => x - y = 1 .......(ii)
Solving (i) and (ii), we get : x = 2, y = 3. Hence, the required fraction is 2/3..
Correct Answer: data inadequate
Explanation:
Let the ten's digit be x and unit's digit be y. Then, (10x + y) - (x + y) = 9 or x = 1.
From this data we cannot find y, the unit's digit. So the data is inadequate..
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