Twinkle tellsRaveena that she has got 3 kids and 2 of these kids are twins, andalso that their ages are all integers. She tells Raveena the sum of theages of her kids and also the product of their ages. Raveena says thatshe has insuficient information to determine the ages, but onepossibility is that the twins are a prime number of years old. IfTwinkle's twins are teenagers and their age is not prime, then the sumof the ages of her kids is
A composite number N has a total of 720 factors. If the number of distinct prime factors of N is the maximum possible, what is the number of pairs of factors which are co-primes and whose product is the given number.
What is the minimum number of weighs which enable us to weigh any integer number of grams of gold from 1 gm to 100 gms on a standard balance with two pans , weights can be put on either pan of balance?
A group of 810 children are arranged in N rows for a photograph. In each row there were 3 students more than the row behind. Then the value of N is? Show solution.
There are N questions in an exam. for i=1,2,3,...N, there are 2^N-i students who answered i or more questions wrongly. The total number of wrong answers is 8191. Then N is...(help me solve this!)
Along a long corridor there are 100 doors marked as 1,2,3....100.as u know the doors can be in two states- 0pen or close.initially all doors are open.person number 1 changes the state of all doors that a multiple of 1 i.e basically all doors.person 2 then changes the state of all doors that are multiple of 2.person 3 then changes state of all doors that are multiple of 3adn so on till the person number 100 changes state of door 100. how many doors are closed??
1) p
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10 doors as sqare numbers have odd number of factors
The signboard at the cloth store 'Stylish Cloth Showroom' lights up as described below. When the switch is turned on all the three words light up and remain lighted for 3 seconds. After that the first word goes off for 47/6 seconds, the second word for 4/3 seconds and the third word for 11/3 seconds. Each word follows its respective pattern of lighting up for 3 seconds and going off for its respective duration. How many seconds after the signboard is switched on will the entire board remain lighted for 3 seconds, for the second time?