A numeric lock has 3 digit code with the below rules:
(3,0,2)one number is correct and well-placed;
(3,5,6)one number is correct but wrong placed;
(5,7,4)Two numbers are correct but wrong placed;
(6,8,9)nothing is correct;
(6,7,0)one number is correct but wrongly placed
405
A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?
If the officials thought he was jumping with a hostage, they would never risk giving him a faulty parachute.
You are on your way to visit your Grandma, who lives at the end of the valley. It's her birthday, and you want to give her the cakes you've made.
Between your house and her house, you have to cross 7 bridges, and as it goes in the land of make believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake.
How many cakes do you have to leave home with to make sure that you arrive at Grandma's with exactly 2 cakes?
2: At each bridge you are required to give half of your cakes, and you receive one back. Which leaves you with 2 cakes after every bridge.
What are the next three numbers in this series?
4, 6, 12, 18, 30, 42, 60, 72, 102, 108, ?, ?, ?
The series lists numbers that are flanked by two prime numbers.
4 (3 and 5 are prime)
6 (5 and 7 are prime)
12 (11 and 13 are prime)
18 (17 and 19 are prime)
30 (29 and 31 are prime)
42 (41 and 43 are prime)
60 (59 and 61 are prime)
72 (71 and 73 are prime)
102 (101 and 103 are prime)
108 (107 and 109 are prime)
thus
138 (137 and 139 are prime), 150 (149 and 151 are prime), 180 (179 and 181 are prime
A man wanted to get into his work building, but he had forgotten his code. However, he did remember five clues. These are what those clues were:
The fifth number plus the third number equals fourteen.
The fourth number is one more than the second number.
The first number is one less than twice the second number.
The second number plus the third number equals ten.
The sum of all five numbers is 30.
What were the five numbers and in what order?
7, 4, 6, 5, 8
What is the next number?
77, 49, 36, 18 ?
The next one is 8
77 : 7*7 = 49
49 : 4*9 = 36
36 : 3*6 = 18
18 : 1*8 = 8
Something Extraordinary happened on May 6th 1978 at 12:34am what was that?
At that moment, the time, and day could be written as '12:34 5/6/78'
A bus driver was heading down a street in Delhi. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?
He was walking
'Ferrari driver' easily beats the 'force Indian driver' in a two-car race.How did Indian newspapers truthfully report so to look as 'force Indian drive' had outdone the 'Ferrari driver'
Think ?
The Indian newspaper reported (correctly) that the 'Ferari driver' came in next to last while the 'force india driver' came in second..
A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number
A: I do not know your number.
B: Neither do I know your number.
A: Now I know.
There are four solution for this.What are they ??
2-3
3-4
7-8
9-10