Oral puzzles

JaneFairfax · 2009-01-10 02:32:55

#453

Whats the radius or height?

Last edited by JaneFairfax (2009-01-10 02:59:37)

Jai Ganesh · 2009-01-10 02:40:19

Sorry, I missed that part of the question. Now edited!Thanks, JaneFairfax! The diameter is 21 cm.

JaneFairfax · 2009-01-10 03:06:31

Jai Ganesh · 2009-01-10 03:20:39

Answer to #453:
The total surfeace area is to be determined.
Please try again!

JaneFairfax · 2009-01-10 03:40:48

You should have made it clearer in the first place. I thought it was open ended.

JaneFairfax · 2009-01-10 14:09:29

Jai Ganesh · 2009-01-10 17:00:22

Answers to #451, #452, and #453:-
All the answers are correct, JaneFairfax!
Regarding #453, by using the words 'Total Surface Area', I thought it would automatically convey the meaning that it is a closed cylinder at the top and the bottom. I am sorry, if it didn't!
For #452, I need to say sorry again. The question should have been
√(3.6% x 40). I missed the decimal by oversight, and that made the question a bit more difficult to answer.

Jai Ganesh · 2009-01-10 17:46:17

#456. Which of the following numbers is divisible by 24?
(1) 35718 (2) 63810 (3) 537804 (4) 3125736

#457. What are the prime factors of 325325?

#458. Which is the largest natural number by which the product of three consecutive even natural numbers is always divisible by?

#459. A 3 digit number 4a3 is added to another 3 digit number 984. The resultant 13b7 is divisible by 11. What is the value of (a+b)?

#460. Which is the greatest number by which the product of three consecutive multiples of 3 is always divisible by?

Jai Ganesh · 2009-01-10 19:06:41

#461. When 52416 is divided by 312, the quotient is 168. What would be the quotient when 52.416 is divided by 0.0168?

#462. Express

as a rational number.

#463. Find the value of x if

.

#464. If x*y = x²+y²-xy, then what is the value of 9*11?

#465. If

, what is the value of
?

Jai Ganesh · 2009-01-11 00:29:16

#466. What is the value of

?

#467. What is the value of

?

#468. What is the quotient when

?

#469. What is the value of

if
?

#470. Find the value of

.

Jai Ganesh · 2009-01-11 03:10:56

#471. A,B, and C enter into a partnership investing $35,000, $45,000, and $55,000 respectively. What is A's share of the annual profit of $40,500?

#472. Ronald and Simon are partners in business. Ronald invests $35,000 for 8 months and Simon invests $42,000 for a period of 10 months. Out of the profit of $31,570, what is Ronald's share?

#473. Stuart started a business by investing $50,000. After six months, norman joined him with a capital of $80,000. After three years, they earned a profit of $24,500. What is Stuart's share of the profit?

#474. A and B together can complete a work in 4 days. A alone can complete it in 12 days, how many days would B alone take to complete the work?

#475. 45 men can complete a work in 16 days. Six days after they started working, 30 more men joined them. How many days would they now take to complete the remaining work?

JaneFairfax · 2009-01-11 12:55:49

The question numbers got messed up after #472.

JaneFairfax · 2009-01-11 13:00:54

Jai Ganesh · 2009-01-11 20:26:27

Thanks, JaneFairfax! Now, I have corrected them!

Answers to #474 and #475:-
You're correct, JaneFairfax! Both the answers are right!

Jai Ganesh · 2009-01-11 22:14:33

#476. 4/15 of 5/7 of a number is greater than 4/9 of 2/5 of the same number by 8. What is half of that number?

#477. What is the value of (3080 + 6160) ÷ 28?

#478. A boy was asked to find the value of

. He wrote the answer as 2592. What is the difference between the answer he had written and the actual answer?

#479. Simplify :- 100 x 10 - 100 + 2000 ÷ 100.

#480.What mathematical operation should replace '?' in the following equation?
2 ? 6 - 12 ÷ 4 + 2 = 11.

$481. Find the value of

.

#482. By how much is three-fifth of 350 greater than four-seventh of 210?

#483. By how much does

exceed
?

$484. If four-fifth of an estate is worth $16,800, what is the value of three-seventh of the estate?

#485. Two-fifth of one-fourth of three-seventh of a number is 15. What is half of that number?

Jai Ganesh · 2009-01-12 02:08:17

#486. What is the value of

?

#487. What is the value of

?

#488. What is the value of

?

#489. What is the value of

?

#490. What is the value of

?

Jai Ganesh · 2009-01-12 20:42:27

#491.The sum of two consecutive odd numbers in a set of three consective odd numbers is 7 more than the third number. What is the second number?

#492. What is the value of

?

#493. What is the value of

?

#494. Find the value of x which satisfies the equation

.

#495. If log 2 = 0.30103, find the number of digits in

.

#496. If log 2 = 0.30103, then what is the value of log 25?

#497. Find the value of y, given

.

#498. if

, then what is the value of
?

#499. What is the value of

?

#500. What is the value of

?

Jai Ganesh · 2009-01-14 01:48:10

#501. If A:B = 3:4 and B:C = 5:6, what is A:C?

#502. Find the value of

#503. Find the Greatest Common Divisor of 72, and 96.

#504. Find the Least Common Multiple of 70, 80, and 90.

#505. In a rally of 256 students, boys and girls are in the ratio 9:7. Find the number of girls.

Jai Ganesh · 2009-01-15 01:01:42

#506. What is the value of x if

?

#507. What is the value of

?

#508. When a fraction is multiplied by itself and the product is divided by reciprocal of the original fraction, the result is

. What is the original fraction?

#509. The probability that a company's manager will travel by ship is 2/3 and that he will travel by flight is 1/5. What is the probability of him travelling by ship or by flight?

#510. The capital stock of a factory was $500,000 and it was divided into 5,000 shares of common stock. If the company paid a dividend of $66,000, what amount would Mr.X receive who holds 40 shares?

#511. The Greatest Common Divisor of two numbers is 11 and their Least Common Multiple is 7700. If one of the numbers is 275, what is the other number?

#512. The cost of 125 shirts is $11,250 and transportation charges of $375 are incurred. If the shirts are sold at a profit of 20%, what would the selling price of a shirt be?

#513. If 1440 is divided into two parts of which one part is

of the other, what is the smaller part?

#514. An article was sold at a loss of 29%. Had it been sold for $84 more, profit of 11% could have been earned. What is the cost price of the article?

#515. The length and breadth of a room are in the ratio 5:2. If the length had been 8 meters less and the breadth 4 meters more, the room would have been a square. What are the length and breadth of the room?

Jai Ganesh · 2009-01-18 01:08:13

#516. If

, what is the value of n?

#517. What is the value of x if

?

#518.

.

#519.

.

#520. What is the value of x if

?

Jai Ganesh · 2009-01-20 04:08:42

#521. 15% of the families in a city have an income of $25,000 or more per annum. Of the families with annual income of $25,000 or more,

of the families own a boat. How many families in the city own a boat?

#522. Successive discounts of 20% and 15% are equal to a single discount of how much percentage?

#523. Oranges cost $100 a crate which contains 20 oranges. If each orange is sold for $6, what percentage of the selling price is the profit?

#524. If hose A can fill a tank in 20 minutes and hose B can fill the same tank in 15 minutes, how long would it take for the two hoses to fill the tank together?

#525. If the area of a square increases by 69%, then by what percentage does the side of the square increase?

#526. If the length of a rectangular field is twice its breadth and the perimter of the field is 300 meters, what is the area of the field?

#527. If x:y::1:2 and x+2:y+1::2:3, what is the value of x?

#528. If the width of a rectangle is increased by 25% while the length remains constant, what percentage of the original area is the resulting area?

#529. R is standing 180 meters North of P. L is standing 240 meters West of P. What is the shortest distance between R and L?

#530. Abdul can stuff advertising circulars at the rate of 45 envelopes per minute and Anwar requires a minute and a half to stuff the same number of envelopes. Working together, how long would it take Abdul and Anwar to stuff 300 envelopes?

Jai Ganesh · 2009-01-20 22:07:28

#531. If the area of a circle is A square units and the circumference if C units, what is the radius of the circle if

?

#532. A cuboidal container is 8 inches long, 4 inches wide and 5 inches in height. How many ice cubes of edge 2 inches can it contain?

#533. A camp has enough stock of food to feed 30 men for 4 days. If 10 more men join the camp from the start, how many days would the stock of food last?

#534. If interest is paid at the rate of

per annum by an investor and if the interest is withdrawn every year from the account without being reinvested, in how many years would the total amount of interest earned be equal to the amount of money invested?

#535. What is the value of

?

Jai Ganesh · 2009-01-22 03:00:19

#536. If the shares bough at prices ranging from $300 to $450 are sold at prices ranging from $400 to $525, the maximum possible profit for selling a specified number of shares is $2250. What is the number of shares sold?

#537. A (4,1), B (2,1), and C (0,1) are the vertices of a triangle. What are the coordiantes of the centroid of the triangle?

#538. If x - y = 3 and x + 2y = 6 are the diamtewrs of a circle, then what are the coordinates of the center of the circle?

#539. Differentiate with respect to x : x cos x.

#540. Find the remainder when 721+722+723+724 is divided by 25.

Jai Ganesh · 2009-01-30 04:05:03

#541. $600 is divided among A, B, and C in such a way that A gets $59 more than B and $53 less than C. How much does A get?

#542. The currency of a state is W. A certain number of currency 10W notes and thrice the number of 20W notes add up to 2100W. How many 20W notes are required?

#543. To a certain number, 7 is added. The sum is multiplied by 5, the product is divided by 9 and 3 is subtracted from the quotient. If the final result is 12, what is the number?

#544. What is the value of x if

?

#545. Which digit would be in the unit's place of

?

Jai Ganesh · 2009-01-31 03:26:44

#546. If

, what is the value of n?

#547. What is the value of x if

?

#548. In a division, the divisor is 12 times the quotient and 5 times the remainder. If the remainder is 48, what is the dividend?

#549. What is the number of prime factors in the product

?

#550. By what least number must 21600 be multiplied to make it a perfect cube?

Math Is Fun Forum

#276 2009-01-10 02:32:55

Re: Oral puzzles

#277 2009-01-10 02:40:19

Re: Oral puzzles

#278 2009-01-10 03:06:31

Re: Oral puzzles

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Re: Oral puzzles

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Re: Oral puzzles

#281 2009-01-10 14:09:29

Re: Oral puzzles

#282 2009-01-10 17:00:22

Re: Oral puzzles

#283 2009-01-10 17:46:17

Re: Oral puzzles

#284 2009-01-10 19:06:41

Re: Oral puzzles

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Re: Oral puzzles

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Re: Oral puzzles

#287 2009-01-11 12:55:49

Re: Oral puzzles

#288 2009-01-11 13:00:54

Re: Oral puzzles

#289 2009-01-11 20:26:27

Re: Oral puzzles

#290 2009-01-11 22:14:33

Re: Oral puzzles

#291 2009-01-12 02:08:17

Re: Oral puzzles

#292 2009-01-12 20:42:27

Re: Oral puzzles

#293 2009-01-14 01:48:10

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#294 2009-01-15 01:01:42

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#295 2009-01-18 01:08:13

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Re: Oral puzzles

#297 2009-01-20 22:07:28

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