Find 9 odd number whose sum is 199
1+3+15+19+21+23+37+39+41=199
IF 3-2 = 2, 16-10 = 4
Number Puzzle #157
If 3 – 2 = 2
16 – 10 = 4
117 – 99 = 9
Then 1000 – 265 = ?
This puzzle is courtesy Pranav, shared via Whatsapp
Check your answer:-
Click here to See Solution
if you write the numbers in english words and than subtract the total number of alphabets in both the word, you will get the answer
for example
three – two = 2
sixteen – ten = 4
one hundred seventeen – ninety nine = 19 – 10 = 9
so
one thousand – two hundred sixty five = 11 – 19 = -8
If 1 + 4 = 5, then 8 + 11 = ?
Number Puzzle #156
If 1 + 4 = 5
2 + 5 = 12
3 + 6 = 21
Then 8 + 11 = ?
Check your answer:-
Click here to See Solution
its
(first number * second number) + first number
so
8 + 11 = 8*11 + 8 = 88 + 8 = 96
(first number * second number) + first number
so
8 + 11 = 8*11 + 8 = 88 + 8 = 96
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permutations n Combinations
There are 10 parking spaces numbered from 101 to 110. At least one car is parked in these slots. If cars can be parked only at the consecutively numbered parking slots, how many such arrangements can be made. Consider that only one car can be parked in one parking slot and all cars are identical.
Check your answer:-
Click here to See Solution
Case 1: 1 car in 10 slots: just pick any 1 slot: i.e. 10C1 = 10!/1!9! = 10, see combination formula here
Case 2: now lets say if 2 cars need to be parked in 10 slots, as the cars need to be parked in consecutive slots only, its similar to choosing 1 position out of 9 slots, i.e. 9C1 = 9
Case 2: now lets say if 2 cars need to be parked in 10 slots, as the cars need to be parked in consecutive slots only, its similar to choosing 1 position out of 9 slots, i.e. 9C1 = 9
if you go on like this, number of ways of parking 10 cars in 10 slots = 1
thus total possible arrangements = 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 +1 = 10*11/2 = 55
IF 11×11 = 171
Number Puzzle #155
11×11=171
12×12=220
13×13=251
14×14=304
15×15=?
Check your answer:-
11×11 = 121 = 171 in base 8
read here on how to convert one number from 10 base to another base
by following that:
121/8 = 15 R 1
15/8 = 1 R 7
read here on how to convert one number from 10 base to another base
by following that:
121/8 = 15 R 1
15/8 = 1 R 7
= 1*8^2 + 7*8^1 + 1*8^0 = 171
thus 15×15 = 225
225/8 = 28 R 1
28/8 = 3 R 4
= 3*8^2 + 4*8^1 + 1*8^0 = 341
OR you can try this online tool to convert the base
Answer courtsey: George Georgiev
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a man every day goes to office 2 hours late and comes after 2 hours. he goes to office by lift upto 9th floor and more 3 floors goes by walking but while returning he comes by lift from 12 th floor, why?
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Nobody can read without me
Solve this,if u r brilliant…….💡💡💡💡
1. I have 9 letters…….
2. Nobody can read without me….📖
3. 4+5+6 is an animal…🐼
4. 7 is me….👦
5. 3 is u…👮
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