10 second questions

bobbym · 2012-01-18 01:52:33

Hi ganesh;

Jai Ganesh · 2012-01-19 02:07:46

Hi bobbym,

The solution #3538

. Your solution slightly higher as you calculated .

The solutions #3539 is correct. Brilliant!

#3540. A number when divided by the sum of 555 and 445 gives two times their difference as quotient and 30 as the reminder. Find the number.

#3541. What is the ratio of the Least Common Multiple and the Greatest Common Divisor of the numbers 28 and 42?

bobbym · 2012-01-19 02:57:27

Hi ganesh;

Jai Ganesh · 2012-01-20 01:19:56

Hi bobbym,

I made a mistake in the problem #3538. Sorry!

The solution #3541 is correct. Good work!

#3542. What is the ratio

equal what ratio?

#3543. If m : n = 3 : 2, what is the ratio (4m + 5n) : (4m - 5n) equal to?

bobbym · 2012-01-20 01:30:10

Hi ganesh;

Jai Ganesh · 2012-01-21 01:53:17

Hi bobbym,

The solutions #3542 and #3543 are correct. Brilliant!

#3544. If food prices go up by 10%, by how much should a person decrease his consumption so as not to increase his expenditure?

#3545. What percent decrease in salaries would exactly cancel out the 20% increase?

bobbym · 2012-01-21 02:06:21

Hi ganesh;

Jai Ganesh · 2012-01-22 01:38:52

Hi bobbym,

The solutions #3544 and #3545 are correct. Excellent!

#3546. A certain number of men can complete a job in 30 days. If there were 5 men more, it could be completed in 10 days less. How many men were in the beginning?

#3547. A and B can do a job in 6 and 12 days respectively. They began the work together but A leaves after 3 days. Then, what is the total number of days needed for the completion of the work?

bobbym · 2012-01-22 02:01:47

Hi ganesh;

Jai Ganesh · 2012-01-23 01:42:31

Hi bobbym,

The solutions #3546 and #3547 are correct. Superlative performance!

#3548. How many digits in all are required to write numbers from 1 to 50?

#3549.

bobbym · 2012-01-23 01:47:26

Hi ganesh;

John E. Franklin · 2012-01-23 12:49:06

Last edited by John E. Franklin (2012-01-23 12:49:47)

John E. Franklin · 2012-01-23 12:51:19

Jai Ganesh · 2012-01-24 02:01:18

Hi bobbym and John E Franklin,

The solutions #3548 and #3549 are correct. Brilliant!

(Use

)

#3550. Find the area of the ring between two concentric circles whose circumference are 88 centimeters and 132 centimeters.

#3551. The perimeters of a square and a circular field are the same. If the area of the circular field is 3850 square meters, what is the area of the square?

bobbym · 2012-01-24 02:11:43

Hi;

John E. Franklin · 2012-01-24 03:13:02

Jai Ganesh · 2012-01-25 01:29:26

Hi bobbym and John E Franklin,

The solutions #3550 and #3551 are correct (770 cm and 3025 square meters respectively).

Excellent, bobbym! Good attempt, John E Franklin!

#3552. If the length of a rectangle is increased by 25% and the width is decreased by 20%, what is the increase or decrease of the area of the rectangle?

#3553. The average of 9 numbers is 30. The average of first 5 numbers is 25 and that of the last 3 numbers is 35. What is the 6th number?

bobbym · 2012-01-25 01:56:21

Hi ganesh;

Jai Ganesh · 2012-01-25 18:37:33

Hi bobbym,

The solution #3552 is correct. Well done!

The solution #3553

#3554.

#3555. The square of a natural number subtracted from its cube is 48. Find the number.

bobbym · 2012-01-26 02:07:04

Hi;

Jai Ganesh · 2012-01-27 01:01:43

Hi bobbym,

The solutions #3554 and #3555 are correct. Intelligent work!

#3556. The simple interest on a sum of money is 4/9 of the Principal and the number of years is equal to the rate percent per annum. What is the rate per annum?

#3557. A shopkeeper marks his at 20% above the cost price and allows the purchaser a discount of 10% for cash buying. What profit percent does he make?

bobbym · 2012-01-27 02:36:32

Hi ganesh;

Jai Ganesh · 2012-01-27 22:41:16

Hi bobbym,

.

The solution #3557 is correct. Good work!

#3558. A train passes a 50 meters long platform in 14 seconds and a man standing on the platform in 10 seconds. What is the speed of the train in kilometers per hour?

#3559. In an examination, a candidate must secure 40% marks to pass. A candidate, who gets 220 marks, fails by 20 marks. What are the maximum marks for the examination?

bobbym · 2012-01-27 23:50:23

Hi;

Jai Ganesh · 2012-01-28 02:33:42

Hi bobbym,

The solution #3559 is perfect. Well done!

#3560. What is the sum 9 + 16 + 25 + 36 + ... + 100 equal to?

Math Is Fun Forum

#3601 2012-01-18 01:52:33

Re: 10 second questions

#3602 2012-01-19 02:07:46

Re: 10 second questions

#3603 2012-01-19 02:57:27

Re: 10 second questions

#3604 2012-01-20 01:19:56

Re: 10 second questions

#3605 2012-01-20 01:30:10

Re: 10 second questions

#3606 2012-01-21 01:53:17

Re: 10 second questions

#3607 2012-01-21 02:06:21

Re: 10 second questions

#3608 2012-01-22 01:38:52

Re: 10 second questions

#3609 2012-01-22 02:01:47

Re: 10 second questions

#3610 2012-01-23 01:42:31

Re: 10 second questions

#3611 2012-01-23 01:47:26

Re: 10 second questions

#3612 2012-01-23 12:49:06

Re: 10 second questions

#3613 2012-01-23 12:51:19

Re: 10 second questions

#3614 2012-01-24 02:01:18

Re: 10 second questions

#3615 2012-01-24 02:11:43

Re: 10 second questions

#3616 2012-01-24 03:13:02

Re: 10 second questions

#3617 2012-01-25 01:29:26

Re: 10 second questions

#3618 2012-01-25 01:56:21

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#3619 2012-01-25 18:37:33

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#3620 2012-01-26 02:07:04

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#3621 2012-01-27 01:01:43

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#3622 2012-01-27 02:36:32

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#3623 2012-01-27 22:41:16

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#3624 2012-01-27 23:50:23

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#3625 2012-01-28 02:33:42

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