The day before yesterday i was 25 and the next year i will be 28. this is true only one day in a year. what day is my birthday?
A petri dish hosts a healthy colony of bacteria. once a minute every bacterium divides into two. the colony was founded by a single cell at noon. at exactly 12:43 (43 minutes later) the petri dish was half full. at what time will the dish be full?
You have a jug that holds five gallons, and a jug that holds three gallons. you have no other containers, and there are no markings on the jugs. you need to obtain exactly seven gallons of water from a faucet. how can you do it? second problem: you need exactly four gallons. how do you do it?
How much dirt is there in a hole in the ground that's two feet wide, three feet long, and four feet deep?
I.q. test" 1 aadmi ko 50 kilo aata piswaany jana hy,batao kis par jae ga? 1- motor cycle par 2- cycle par 3- pedal
You can place weights on both side of weighing balance and you need to measure all weights between 1 and 1000. for example if you have weights 1 and 3,now you can measure 1,3 and 4 like earlier case, and also you can measure 2,by placing 3 on one side and 1 on the side which contain the substance to be weighed. so question again is how many minimum weights and of what denominations you need to measure all weights from 1kg to 1000kg.
Outside a room there are three light switches. one of switch is connected to a light bulb inside the room. each of the three switches can be either 'on' or 'off'. you are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once) your task is to then determine which switch controls the bulb ??
A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. also, the difference between it's reverse and itself is 396. what is the sum of the three digits?
Four people need to cross a dark river at night. they have only one torch and the river is too risky to cross without the torch. at max two people can cross simultaneously. speed of each person of crossing the river is different.cross time for each person is 1 min, 2 mins, 7 mins and 10 mins. what is the shortest time needed for all four of them to cross the river ?
Agar aap race mein doosray number pe aanay walay ko overtake kar gaye toh aap kaunsi position pe huay? . . . . . .