Oral puzzles

Jai Ganesh · 2020-03-30 00:34:18

Hi,

#4745. A bag contains 7 blue balls and 5 yellow balls. If two balls are selected at random, what is the probability of none is yellow?

Jai Ganesh · 2020-04-01 00:29:11

Hi,

#4746. A die is thrown twice. What is the probability of getting a sum of 7 from both the throws?

Jai Ganesh · 2020-04-03 00:23:53

Hi,

#4747. In a box, there are 8 red, 7 blue, and 6 green balls. One balls is picked up randomly. What is the probability of it being neither blue nor green?

Jai Ganesh · 2020-04-05 00:20:00

Hi,

#4748. A bag contains 4 red, 5 yellow, and 6 pink balls. Two balls are drawn at random. What is the probability of none of the balls being drawn are yellow?

Jai Ganesh · 2020-04-07 00:09:45

Hi,

#4749. A bag contains 5 red, 7 yellow, and 3 pink balls. If two balls are drawn at random from the bag, one after the other, what is the probability of the first ball being red, and the second ball being yellow?

Jai Ganesh · 2020-04-09 00:45:16

Hi,

#4750. A box contains 14 eggs out of which 8 are rotten. Two eggs are chosen at random. What is the probability of none of the eggs being rotten?

Jai Ganesh · 2020-04-11 00:16:09

Hi,

#4751. In a bag, there are 6 red balls, 4 green balls, and 8 yellow balls. What is the probability of drawing one ball which is neither green nor yellow?

Jai Ganesh · 2020-04-13 00:17:59

Hi,

#4752. A bag contains 13 white and 7 black balls. Two balls are drawn at random. What is the probability of they being of the same color?

Jai Ganesh · 2020-04-15 00:06:31

Hi,

#4753. A bag contains 3 red balls, 5 yellow balls, and 7 pink balls. If one ball is drawn at random from the bag, what is the probability of it being either pink or red?

Jai Ganesh · 2020-04-17 00:32:09

Hi,

#4754. A bag contains 7 blue balls and 5 yellow balls. If two balls are selected at random, what is the probability of neither of them being yellow?

Jai Ganesh · 2020-04-19 00:04:28

Hi,

#4755. How many terms are there in an Arithmetic Progression 10, 12, 14, 16, ......., 80?

Jai Ganesh · 2020-04-21 00:03:59

Hi,

#4756. In an Arithmetic Progression 1, 3, 5, ..., which term of this Arithmetic Progression is 155?

Jai Ganesh · 2020-04-23 00:09:34

Hi,

#4757. Find the 15th term of the sequence : 20, 15, 10, ....

Jai Ganesh · 2020-04-25 00:03:13

Hi,

#4758. Find the sum of last 5 terms of the series 3, 8, 13, ....., 103.

Jai Ganesh · 2020-04-27 00:07:12

Hi,

#4759. Find the value of the expression 1 - 6 + 3 - 10 + 5 - 14 + 7 - 18 + .... up to 100 terms.

Jai Ganesh · 2020-04-29 00:20:09

Hi,

#4760. Find the value of 50 terms of

.

Jai Ganesh · 2020-05-01 00:24:14

Hi,

#4761. A number 27 is divided into three parts which are in Arithmetic Progression and the sum of their squares is 261. Find the smallest one.

Jai Ganesh · 2020-05-03 00:22:28

Hi,

#4762. A sum of money kept in a savings bank account amount to $1240 in 4 years and $1600 in 10 years. Find the sum (simple interest).

Jai Ganesh · 2020-05-05 00:10:17

Hi,

#4763. Robert receives $600 in the first week and $30 more each week than the preceding. What does he get in the 20th week?

Jai Ganesh · 2020-05-08 00:14:13

Hi,

#4764. Robert receives $600 in the first week and $30 more each week than the preceding. What is the total amount he has received by the end of the 20th week?

Jai Ganesh · 2020-05-10 00:16:59

Hi,

#4765. Find the least value of n for which the sum of the series 5 + 8 + 11 + ... up to n terms is not less than 670.
(a) 20
(b) 21
(c) 22
(d) 23.

Jai Ganesh · 2020-05-12 00:07:29

Hi,

#4766. How many natural numbers between 100 and 400 are there which are multiples of 9?

Jai Ganesh · 2020-05-14 00:59:32

Hi,

.

#4767. Find the number of terms in the series 15 + 13 + 11 + 9 + 7 + 5+ ...... such that the sum is 63. If there are two solutions, give both.

Jai Ganesh · 2020-05-16 00:02:21

Hi,

#4768. Find the least value of n for which the sum of the series 3 + 7 + 11 + 15 + 19 + ... is greater than 820.

Jai Ganesh · 2020-05-18 00:32:59

Hi,

#4769. The average of 50 numbers is 38. If two numbers viz. 45 and 55 are discarded, find the average of the remaining numbers.

Math Is Fun Forum

#6601 2020-03-30 00:34:18

Re: Oral puzzles

#6602 2020-04-01 00:29:11

Re: Oral puzzles

#6603 2020-04-03 00:23:53

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#6604 2020-04-05 00:20:00

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#6605 2020-04-07 00:09:45

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#6606 2020-04-09 00:45:16

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#6607 2020-04-11 00:16:09

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#6608 2020-04-13 00:17:59

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#6609 2020-04-15 00:06:31

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#6610 2020-04-17 00:32:09

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#6611 2020-04-19 00:04:28

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#6612 2020-04-21 00:03:59

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#6613 2020-04-23 00:09:34

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#6614 2020-04-25 00:03:13

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#6615 2020-04-27 00:07:12

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#6616 2020-04-29 00:20:09

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#6617 2020-05-01 00:24:14

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#6618 2020-05-03 00:22:28

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#6619 2020-05-05 00:10:17

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#6620 2020-05-08 00:14:13

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#6621 2020-05-10 00:16:59

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#6622 2020-05-12 00:07:29

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#6623 2020-05-14 00:59:32

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#6624 2020-05-16 00:02:21

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#6625 2020-05-18 00:32:59

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