10 second questions

JaneFairfax · 2009-01-08 08:47:24

What is wrong with my answer to #1312?

mathsyperson · 2009-01-08 10:38:46

I'm guessing you made a slip when dividing by 4.

JaneFairfax · 2009-01-08 11:41:06

I see my mistake now. The poles are 12 metres apart; I took it to be 10 metres by mistake.

Jai Ganesh · 2009-01-08 16:38:25

Answer to #1312:-
This time you're correct, JaneFairfax!
Answer to #1319:-
You're correct, careless25!
Both of you,

Jai Ganesh · 2009-01-09 01:05:51

#1321. Nancy scored 50% marks in French, 60% in English and 70% in Mathematics as well as in Science. What was her total marks if the maximum marks that could be obtained in each of these 4 subjects was 50?

#1322. 300 grams of sugar solution has 40% sugar in it. How much sugar should be added to make it 50% in the solution?

#1323. A man donates 12½ of his money and after spending 70% of the remainder, has $210 left. How much money did he have initially?

#1324. In an examination in which the full marks were 500, A got 10% less than B, B got 25% more than C and C got 20% less than D. If A got 360 marks, what percentage marks did D get?

#1325. The number of students studying Arts, Commerce and Science in a College was in the ratio 6:5:3 respectively. If the number of students in Arts, Commerce, and Science were increased by 10%, 30% and 15% respectively, what would the new ratio be between the number of students in the three streams?

Jai Ganesh · 2009-01-09 03:01:40

#1326. In measuring the sides of a rectangle, errors of 5% and 3% in excess are made. What is the percentage error in the calculated area?

#1327. In a certain examination, there were 2500 candidates. Of them, 20% were girls and the rest were boys. If 5% of the boys and 40% of the girls failed, what is the percentage of candidates who passed?

#1328. A man spends 75% of his income. His income increases by 20% and he increased his expenditure by 15%. By what percentage are his savings increased?

#1329. A boy after giving away 80% of his pocket money to a companion and 6% of the remainder to another has $47 left with him. How much pocket money did he have in the begining?

#1330.Two cars A and B are travelling towards each other from two different places 88 kilometers apart. If the ratio of the speeds of the cars A and B are 5:6 and the speed of car B is 90 kilometers per hour, after what time from the time of start would they meet each other?

JaneFairfax · 2009-01-09 09:42:53

Jai Ganesh · 2009-01-09 16:39:32

Answer to #1322:-
Please try again, JaneFairfax!

courteous · 2009-01-09 19:50:06

#1329. $250

Jai Ganesh · 2009-01-09 23:47:13

Answer to #1329:-
Correct, courteous!

Jai Ganesh · 2009-01-10 00:12:09

#1331. A construction company borrowed $850,000 for 5 years at the rate of interest of 1½ % per annum. How much total interest does the company have to pay?

#1332.A money-lender borrows money at 4% per annum and pays the interest at the end of the year. He lends it at 6% per annum compound interest compounded half-yearly and the receives the interest at the end of the year. In this way, he gains $104.50. What is the amount of money he borrowed?

#1333. Simple interest on $500 for 4 years at 6.25% is equal to the simple interest on $400 at 5% per annum for a certain period of time. What is the period of time?

#1334. A sum of money on compound interest amounts to $10,648 in 3 years and $9,680 in 2 years. What is the rate of interest per annum?

#1335. If in a certain number of years, $3,000 amounts to $4,320 at compound interest, what would $3,000 amount to in half that period?

JaneFairfax · 2009-01-10 01:46:14

Oops!

Jai Ganesh · 2009-01-10 01:48:17

Answer to #1322 :
This time correct, JaneFairfax!

Jai Ganesh · 2009-01-10 02:35:28

#1336. On a journey across Chennai, a car averages 20 km/hour for 70% of the distance, 25 km/hour for 10% of the distance and 8 km/hour for the remaining distance. What is the average speed of the car for the whole journey?

#1337. The average temperature from 9th to 16th of a month, both days included, was 34.6° C and from 10th to 17th, it was 35.8° C. The temperature on the 9th was 30.5° C. What was it on the 17th?

#1338. Simplify:-

.

#1339. Two brothers A and B have their annual income in the ratio 8:5, while their spending is in the ratio 5:3. If they save $1200 and $1000 respectively, find their annual income.

#1340. 16 men or 28 women can do a work in 40 days. In how many days would 24 men and 14 women complete the same work?

JaneFairfax · 2009-01-10 02:44:34

Jai Ganesh · 2009-01-10 03:11:56

Answers to #1326 and #1336:-
Both correct, JaneFairfax!

JaneFairfax · 2009-01-10 03:34:13

Jai Ganesh · 2009-01-10 03:41:15

Answer to #1340:-
You're correct, JaneFairfax!

JaneFairfax · 2009-01-10 14:14:34

Jai Ganesh · 2009-01-10 16:44:19

Answers to #1329 and #1330:-
Both correct, JaneFairfax!

Jai Ganesh · 2009-01-10 17:58:48

#1341. What is the smallest number to be added to 1,000 so that the resultant is divisible by 45?

#1342. What is the least number by which 72 must be multiplied in order to produce a multiple of 112?

#1343. A number when divided by 3 leaves a remainder 1. When the quotient is divided by 2, it leaves a remainder 1. What would the remainder be when the number is divided by 6?

#1344. By which of the following numbers is

divisible by?
(1) 3 (2) 10 (3) 11 (4) 13

#1345. If x is a whole number, then what is the biggest number x²(x²-1) is always divisible by?

Jai Ganesh · 2009-01-10 18:48:57

#1346. Two numbers are in the ratio 15:11. If their Greatest Common Divisor is 13, find the numbers.

#1347.Find the smallest number of five digits divisible by 16, 24, 36, and 54.

#1348. Two numbers are in the ratio 3:4 and their Greatest Common Divisor is 4. What is their Least Common Multiple?

#1349. The Least Common Multiple of two prime numbers x and y(x>y) is 161. What is the value of (3y-x)?

#1350. A rectangular courtyard 3.78 meters long and 5.25 meters wide is to be paved with square tiles, all of the same size. What is the largest size of the tile which could be used for the purpose?

#1351. What is the value of

?

#1352. What is the value of

?

Jai Ganesh · 2009-01-10 19:31:52

#1353. What is the value of

?

#1354. What is the value of

?

#1355. What is the value of

?

#1356. What is the value of

?

#1357. What is the square root of (272² - 128²)?

#1358. If y=5, then what is the value of

?

Jai Ganesh · 2009-01-10 20:52:58

#1359. 50 is divided into two parts such that sum of their reciprocals is

. Find the two parts.

#1360. If three numbers are added in pairs, the sums equal 10, 19 and 21. Find the three numbers.

#1361. A fraction becomes

when 1 is added to both its numerator and denominator. It becomes when 1 is subtracted from both the numerator and the denominator. Find the fraction.

#1362. The sum of squares of three consecutive odd numbers is 2531. Find the numbers.

#1363.The sum of two numbers is 15 and the sum of their squares is 113. Find the numbers.

#1364. The average of four consecutive even numbers is 27. Find the largest of these numbers.

JaneFairfax · 2009-01-11 00:52:49

Math Is Fun Forum

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